Home
Search results “Oracle select count records”
SQL Tutorial : Difference Between Count(1) and Count(*)  in SQL Oracle
 
06:43
SQL Tutorial : Difference Between Count(1) and Count(*) in SQL Oracle SQL Tutorial SQL Tutorial for beginners PLSQL Tutorial PLSQL Tutorial for beginners PL/SQL Tutorial PL SQL Tutorial PL SQL Tutorial for beginners PL/SQL Tutorial for beginners Oracle SQL Tutorial
Views: 2202 TechLake
SQL Aggregation queries using Group By, Sum, Count and Having
 
10:01
From SQL Queries Joes 2 Pros (Vol2) ch4.1. Learn up to write aggregated queries.
Views: 161936 Joes2Pros SQL Trainings
Oracle COUNT Function
 
04:43
https://www.databasestar.com/oracle-count/ The Oracle COUNT function is used to count the number of rows from the column, or number of values, provided to it. It’s commonly used to find the number of rows returned by a SELECT query. The syntax of the COUNT function is: COUNT ( [ * | [ DISTINCT | ALL ] expression) [ over (analytic_clause) ] There’s a lot of square brackets here, indicating optional parameters and choices. This just means you can use the COUNT function in a few different ways: COUNT(*) COUNT(DISTINCT expression) COUNT(ALL expression) COUNT(*) OVER (analytic_clause) COUNT(DISTINCT expression) OVER (analytic_clause) COUNT(ALL expression) OVER (analytic_clause) It can be used as an aggregate or analytic function. The parameters of the COUNT function are: - expression: The expression to count the values of. This can be a column or a set of values, for example. - analytic_clause: This is used to specify the criteria for an analytic query. COUNT(*) is the most common way to use this function, I’ve found. As COUNT(*) is an aggregate function, like all aggregate functions the columns mentioned in the SELECT clause need to exist in the GROUP BY clause. NULL values are ignored by COUNT(expression), but they are counted when using COUNT(*). COUNT(*) has the exact same calculation and performance as COUNT(1). For more information about the Oracle COUNT function, including all of the SQL shown in this video and the examples, read the related article here: https://www.databasestar.com/oracle-count/
Views: 89 Database Star
Oracle SQL Developer Tutorial For Beginners  15   SELECT COUNT
 
00:47
Oracle SQL Developer Tutorial For Beginners Series. This course introduces Oracle SQL Development for its subscribers. Currently this is based on Oracle 12c. The test environment is in Windows 10.
Views: 2617 Sam Dhanasekaran
SQL with Oracle 10g XE - Using the COUNT and SUM Functions
 
04:09
In this video I use the COUNT and SUM functions available to the SQL language. I used the COUNT function to add up the number of records in my query. This function works well with all data types and will just count the number or records that result from the conditions of your query. The SUM function will add up the numeric values and produce a total amount of a column. When using a function be sure to use parenthesis around the column you are performing the function on. This video is part of a series of videos with the purpose of learning the SQL language. For more information visit Lecture Snippets at http://lecturesnippets.com.
Views: 7596 Lecture Snippets
DISTINCT Clause & UNIQUE Keyword in Oracle | Oracle Tutorials for Beginners
 
06:59
DISTINCT & UNIQUE Keyword in Oracle | Oracle Tutorials for Beginners DISTINCT Keyword in Oracle DISTINCT Clause in Oracle UNIQUE Keyword in Oracle UNIQUE Clause in Oracle Oracle Tutorials for Beginners Oracle Tutorials for Beginners select distinct * sql distinct multiple columns sql distinct count select distinct on one column with multiple columns returned select distinct mysql sql count distinct multiple columns oracle distinct count sql distinct group by sql count distinct two columns select distinct on one column with multiple columns returned select distinct on one column with multiple columns returned oracle sql select unique values from multiple columns select distinct multiple columns mysql select distinct all columns sql count distinct multiple columns group by sql select distinct multiple columns group by select distinct oracle select distinct rows sql select distinct multiple columns select distinct on one column select count distinct select unique mysql how to select unique records in oracle without using distinct sql select distinct values and count of each Oracle Tutorials for Beginners Oracle Tutorials for Beginners Oracle Tutorials for Beginners Oracle Tutorials for Beginners
Views: 383 Oracle PL/SQL World
SQL Distinct and Multiple Columns
 
02:53
Jamie King of Neumont University showing how SQL DISTINCT varies when multiple columns are present in the result set.
Views: 17409 Jamie King
Using COUNT in Other Ways (Introduction to Oracle SQL)
 
04:09
Other ways to use the COUNT function in SQL. The full Introduction to Oracle SQL course is available here: https://www.databasestar.com/introduction-to-oracle-sql-course/
Views: 113 Database Star
Row Number function in SQL Server
 
07:24
sql server row_number example sql server row number by partition sql server row_number over partition by order by In this video we will discuss Row_Number function in SQL Server. This is continuation to Part 108. Please watch Part 108 from SQL Server tutorial before proceeding. Row_Number function Introduced in SQL Server 2005 Returns the sequential number of a row starting at 1 ORDER BY clause is required PARTITION BY clause is optional When the data is partitioned, row number is reset to 1 when the partition changes Syntax : ROW_NUMBER() OVER (ORDER BY Col1, Col2) Row_Number function without PARTITION BY : In this example, data is not partitioned, so ROW_NUMBER will provide a consecutive numbering for all the rows in the table based on the order of rows imposed by the ORDER BY clause. SELECT Name, Gender, Salary, ROW_NUMBER() OVER (ORDER BY Gender) AS RowNumber FROM Employees Please note : If ORDER BY clause is not specified you will get the following error The function 'ROW_NUMBER' must have an OVER clause with ORDER BY Row_Number function with PARTITION BY : In this example, data is partitioned by Gender, so ROW_NUMBER will provide a consecutive numbering only for the rows with in a parttion. When the partition changes the row number is reset to 1. SELECT Name, Gender, Salary, ROW_NUMBER() OVER (PARTITION BY Gender ORDER BY Gender) AS RowNumber FROM Employees Use case for Row_Number function : Deleting all duplicate rows except one from a sql server table. Discussed in detail in Part 4 of SQL Server Interview Questions and Answers video series. Text version of the video http://csharp-video-tutorials.blogspot.com/2015/09/rownumber-function-in-sql-server.html Slides http://csharp-video-tutorials.blogspot.com/2015/09/rownumber-function-in-sql-server_30.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 74642 kudvenkat
ORACLE SQL INTERVIEW QUESTION : HOW TO SELECT ODD OR EVEN ROWS FROM A TABLE IN ORACLE
 
03:52
This video tutorial answers the frequently asked interview question, how to select only odd or even records in oracle sql, after watching this video you will understand more on the topic and will be able to answer this interview question with a lot of confidence.
Views: 3590 Kishan Mashru
SQL Inner Join Multiple Tables with SUM Tutorial - SQL 2008/2012/2016/2017
 
18:03
Use inner joins with multiple tables to create reports. Uses aliases, and the SUM aggregate function to demonstrate the flexibility of the join statement. Get the SQL script to create the database and run the exercies in the video here: https://www.qewbi.com/sql/scripts/qewbijoins.zip
Views: 129663 Edward Kench
SQL query to find first record and last record in single query
 
08:55
SQL query to find first record and last record in single query
Views: 7485 SQL Guru
COUNT DISTINCT
 
03:57
How to count DISTINCT records and also talk about how MAX function can be used on all datatypes
Views: 7844 Lew Cousineau
How to Fetch Latest record/row from the Table in Oracle Database
 
03:32
You will learn how to How to Fetch Latest record/row from the Table in Oracle Database. Realtime Scenario: This logic can be implemented to find whether the latest record should be inserted or updated to datawarehouse
Java prog#105. Take count of  all rows of one column from sql in java netbeans
 
03:29
------------------Online Courses to learn---------------------------- Java - https://bit.ly/2H6wqXk C++ - https://bit.ly/2q8VWl1 AngularJS - https://bit.ly/2qebsLu Python - https://bit.ly/2Eq0VSt C- https://bit.ly/2HfZ6L8 Android - https://bit.ly/2qaRSAS Linux - https://bit.ly/2IwOuqz AWS Certified Solutions Architect - https://bit.ly/2JrGoAF Modern React with Redux - https://bit.ly/2H6wDtA MySQL - https://bit.ly/2qcF63Z ----------------------Follow--------------------------------------------- My Website - http://www.codebind.com My Blog - https://goo.gl/Nd2pFn My Facebook Page - https://goo.gl/eLp2cQ Google+ - https://goo.gl/lvC5FX Twitter - https://twitter.com/ProgrammingKnow Pinterest - https://goo.gl/kCInUp Text Case Converter - https://goo.gl/pVpcwL -------------------------Stuff I use to make videos ------------------- Stuff I use to make videos Windows notebook – http://amzn.to/2zcXPyF Apple MacBook Pro – http://amzn.to/2BTJBZ7 Ubuntu notebook - https://amzn.to/2GE4giY Desktop - http://amzn.to/2zct252 Microphone – http://amzn.to/2zcYbW1 notebook mouse – http://amzn.to/2BVs4Q3 ------------------Facebook Links ---------------------------------------- http://fb.me/ProgrammingKnowledgeLearning/ http://fb.me/AndroidTutorialsForBeginners http://fb.me/Programmingknowledge http://fb.me/CppProgrammingLanguage http://fb.me/JavaTutorialsAndCode http://fb.me/SQLiteTutorial http://fb.me/UbuntuLinuxTutorials http://fb.me/EasyOnlineConverter sql query - how to count values in a row sql Get row count of a resultset in java SQL COUNT Function java Java get number of rows in resultset Counting Rows with COUNT() java
Views: 19518 ProgrammingKnowledge
SQL DISTINCT Within a SELECT - Retrieving Unique Values
 
03:41
Jamie King of Neumont University demonstrating use of DISTINCT within a SQL SELECT command.
Views: 20996 Jamie King
TUTORIAL-3 Select, functions like min, max, count, sum, avg in oracle database
 
07:47
select, functions like min, max, count, sum, avg in oracle database. Demonstration of working on a table and data in it. Please like and subscribe us.
Views: 54 Let's Learn Pro
How to Select Even or Odd Rows from a Table in SQL Server
 
03:18
How to show only even or odd rows in sql For more SQL Server Tutorial Visit: http://subnol.blogspot.com/ #subnol #sqlfighter
Views: 5629 SQL Fighter
SQL Syntax Select Most Common Record Occurrence List
 
03:51
Lesson Code: http://www.developphp.com/video/SQL/SQL-Select-Most-Common-Record-Occurrence-List Learn the SQL syntax of a very useful database query. This single query is full of logic that you can carry into other queries you need to write. Learn to group occurrences, count, order and limit the result set. It is useful for finding the most popular occurrences in your databases and rendering a list of them.
Views: 10495 Adam Khoury
Part 4   Delete duplicate rows in sql
 
03:26
Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/05/part-4-delete-duplicate-rows-in-sql.html In this video, we will discuss deleting all duplicate rows except one from a sql server table. SQL Script to create Employees table Create table Employees ( ID int, FirstName nvarchar(50), LastName nvarchar(50), Gender nvarchar(50), Salary int ) GO Insert into Employees values (1, 'Mark', 'Hastings', 'Male', 60000) Insert into Employees values (1, 'Mark', 'Hastings', 'Male', 60000) Insert into Employees values (1, 'Mark', 'Hastings', 'Male', 60000) Insert into Employees values (2, 'Mary', 'Lambeth', 'Female', 30000) Insert into Employees values (2, 'Mary', 'Lambeth', 'Female', 30000) Insert into Employees values (3, 'Ben', 'Hoskins', 'Male', 70000) Insert into Employees values (3, 'Ben', 'Hoskins', 'Male', 70000) Insert into Employees values (3, 'Ben', 'Hoskins', 'Male', 70000) The delete query should delete all duplicate rows except one. Here is the SQL query that does the job. PARTITION BY divides the query result set into partitions. WITH EmployeesCTE AS ( SELECT *, ROW_NUMBER()OVER(PARTITION BY ID ORDER BY ID) AS RowNumber FROM Employees ) DELETE FROM EmployeesCTE WHERE RowNumber ] 1
Views: 311488 kudvenkat
How to use Sum, Avg and Count in Select Statement - SQL Server / TSQL Tutorial Part 128
 
08:25
How to use Sum, Avg and Count in Select Statement Scenario: Let's say that you have dbo.Customer table with SaleAmount column and you are asked to write a query that should return you sum of SaleAmount, Average of SaleAmount and Count of all the records. Solution: You can use Aggregate functions such as Sum, Avg and count in TSQL to find the answer of your question. Let's create dbo.Customer Table with sample data so we can use Sum, Avg and Count aggregate functions. Link to scripts used in SQL Server / TSQL Tutorial Video http://www.techbrothersit.com/2017/03/how-to-use-sum-avg-and-count-in-select.html Check out our website for Different SQL Server, MSBI tutorials and interview questions such as SQL Server Reporting Services(SSRS) Tutorial SQL Server Integration Services(SSIS) Tutorial SQL Server DBA Tutorial SQL Server 2016 DBA Tutorial SQL Server / TSQL Tutorial ( Beginner to Advance) http://www.techbrothersit.com/
Views: 1463 TechBrothersIT
ORACLE SQL 6: Distinct & Count
 
08:31
http://studyandshare.wordpress.com/ http://www.facebook.com/groups/studyandsharevn/
Views: 920 studyandsharevn
Performance difference between Count(*) and Count(1)
 
04:56
Its being very confusing topic for me,I have decided to create video and share my knowledge with you guys.Please gives your feedback and suggestion.Thanks.
Views: 1073 SqlIsEasy
05 of 15 SQL Basics with Oracle - SELECT ... FROM ....
 
09:09
This video shows the simplest, most commonly used SQL command: SELECT ... FROM. We use SQL Developer to view data from tables in the students-teams database and in the HR database. We see how to specify a schema name for a table and how to count rows in a table without showing detailed data from the table. (5 of 15) There is also an "Advanced SQL" series. (Search for "databasemec" for tutorials using SQL Server.)
Views: 3457 Jennifer Kreie
SQL Server - Query Table Record Data via TSQL - SELECT COUNT
 
03:06
How to select count(*) of table records. This tutorial covers how to select count(*) of entire table or how to select count(*) of a subset of data via using a where clause filter.
Views: 1047 Dave Merton
Finding Duplicates using Count in SQL Select (Arabic)
 
02:46
ايجاد عدد التكرار في الاستعلام
Views: 291 Waheed Alsayer
Oracle Database11g tutorials 8 || SQL DISTINCT with multiple columns |SQL Distinct with Two columns
 
04:33
This SQL tutorial and Oracle database 11g tutorial for beginners will show how to use SQL DISTINCT keyword with SQL Select clause. This Video is in the continuation of previous video on SQL distinct with one column. In this video we will see How to use SQL distinct with multiple columns and SQL distinct with two columns Tool used in this tutorial is SQL developer. This tutorial series is part of SQL expert exam certification training. If you are preparing for SQL certification you can use my tutorials. This SQL Tutorial is a part of free training. Copy Cloud referral link || Use this link to join copy cloud and get 20GB of free storage https://copy.com?r=j7eYO7 Contacts Email [email protected] Twitter https://twitter.com/rebellionrider Instagram http://instagram.com/rebellionrider Facebook. https://www.facebook.com/imthebhardwaj Linkedin. in.linkedin.com/in/mannbhardwaj/ Thanks for linking, commenting, sharing and watching more of our videos This is Manish From The Code makers
Views: 96475 Manish Sharma
Sql query to select all names that start with a given letter without like operator
 
03:02
Text Article http://csharp-video-tutorials.blogspot.com/2017/01/sql-query-to-select-all-names-that.html Slides http://csharp-video-tutorials.blogspot.com/2017/01/sql-query-to-select-all-names-that_31.html SQL Server Interview Questions and Answers text articles & slides http://csharp-video-tutorials.blogspot.com/2014/05/sql-server-interview-questions-and.html SQL Server Interview Questions and Answers playlist https://www.youtube.com/playlist?list=PL6n9fhu94yhXcztdLO7i6mdyaegC8CJwR All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists In this video we will discuss writing a SQL query to retrieve all student names that start with letter 'M' without using the LIKE operator. If the interviewer has not mentioned not to use LIKE operator, we would have written the query using the LIKE operator as shown below. SELECT * FROM Students WHERE Name LIKE 'M%' We can use any one of the following 3 SQL Server functions, to achieve exactly the same thing. CHARINDEX LEFT SUBSTRING The following 3 queries retrieve all student rows whose Name starts with letter 'M'. Notice none of the queries are using the LIKE operator. SELECT * FROM Students WHERE CHARINDEX('M',Name) = 1 SELECT * FROM Students WHERE LEFT(Name, 1) = 'M' SELECT * FROM Students WHERE SUBSTRING(Name, 1, 1) = 'M'
Views: 51389 kudvenkat
Part 1   How to find nth highest salary in sql
 
11:45
Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/05/part-1-how-to-find-nth-highest-salary_17.html This is a very common SQL Server Interview Question. There are several ways of finding the nth highest salary. By the end of this video, we will be able to answer all the following questions as well. How to find nth highest salary in SQL Server using a Sub-Query How to find nth highest salary in SQL Server using a CTE How to find the 2nd, 3rd or 15th highest salary Let's use the following Employees table for this demo Use the following script to create Employees table Create table Employees ( ID int primary key identity, FirstName nvarchar(50), LastName nvarchar(50), Gender nvarchar(50), Salary int ) GO Insert into Employees values ('Ben', 'Hoskins', 'Male', 70000) Insert into Employees values ('Mark', 'Hastings', 'Male', 60000) Insert into Employees values ('Steve', 'Pound', 'Male', 45000) Insert into Employees values ('Ben', 'Hoskins', 'Male', 70000) Insert into Employees values ('Philip', 'Hastings', 'Male', 45000) Insert into Employees values ('Mary', 'Lambeth', 'Female', 30000) Insert into Employees values ('Valarie', 'Vikings', 'Female', 35000) Insert into Employees values ('John', 'Stanmore', 'Male', 80000) GO To find the highest salary it is straight forward. We can simply use the Max() function as shown below. Select Max(Salary) from Employees To get the second highest salary use a sub query along with Max() function as shown below. Select Max(Salary) from Employees where Salary [ (Select Max(Salary) from Employees) To find nth highest salary using Sub-Query SELECT TOP 1 SALARY FROM ( SELECT DISTINCT TOP N SALARY FROM EMPLOYEES ORDER BY SALARY DESC ) RESULT ORDER BY SALARY To find nth highest salary using CTE WITH RESULT AS ( SELECT SALARY, DENSE_RANK() OVER (ORDER BY SALARY DESC) AS DENSERANK FROM EMPLOYEES ) SELECT TOP 1 SALARY FROM RESULT WHERE DENSERANK = N To find 2nd highest salary we can use any of the above queries. Simple replace N with 2. Similarly, to find 3rd highest salary, simple replace N with 3. Please Note: On many of the websites, you may have seen that, the following query can be used to get the nth highest salary. The below query will only work if there are no duplicates. WITH RESULT AS ( SELECT SALARY, ROW_NUMBER() OVER (ORDER BY SALARY DESC) AS ROWNUMBER FROM EMPLOYEES ) SELECT SALARY FROM RESULT WHERE ROWNUMBER = 3
Views: 828614 kudvenkat
Difference between rows and range
 
05:52
range vs rows in sql server difference between rows clause and range clause in sql server range clause vs rows clause in sql server sql server running total query running total example in sql server In this video we will discuss the difference between rows and range in SQL Server. This is continuation to Part 116. Please watch Part 116 from SQL Server tutorial before proceeding. Let us understand the difference with an example. We will use the following Employees table in this demo. SQL Script to create the Employees table Create Table Employees ( Id int primary key, Name nvarchar(50), Salary int ) Go Insert Into Employees Values (1, 'Mark', 1000) Insert Into Employees Values (2, 'John', 2000) Insert Into Employees Values (3, 'Pam', 3000) Insert Into Employees Values (4, 'Sara', 4000) Insert Into Employees Values (5, 'Todd', 5000) Go Calculate the running total of Salary and display it against every employee row The following query calculates the running total. We have not specified an explicit value for ROWS or RANGE clause. SELECT Name, Salary, SUM(Salary) OVER(ORDER BY Salary) AS RunningTotal FROM Employees So the above query is using the default value which is RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW This means the above query can be re-written using an explicit value for ROWS or RANGE clause as shown below. SELECT Name, Salary, SUM(Salary) OVER(ORDER BY Salary RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS RunningTotal FROM Employees We can also achieve the same result, by replacing RANGE with ROWS SELECT Name, Salary, SUM(Salary) OVER(ORDER BY Salary ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS RunningTotal FROM Employees What is the difference between ROWS and RANGE To understand the difference we need some duplicate values for the Salary column in the Employees table. Execute the following UPDATE script to introduce duplicate values in the Salary column Update Employees set Salary = 1000 where Id = 2 Update Employees set Salary = 3000 where Id = 4 Go Now execute the following query. Notice that we get the running total as expected. SELECT Name, Salary, SUM(Salary) OVER(ORDER BY Salary ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS RunningTotal FROM Employees The following query uses RANGE instead of ROWS SELECT Name, Salary, SUM(Salary) OVER(ORDER BY Salary RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS RunningTotal FROM Employees Notice we don't get the running total as expected. So, the main difference between ROWS and RANGE is in the way duplicate rows are treated. ROWS treat duplicates as distinct values, where as RANGE treats them as a single entity. All together side by side. The following query shows how running total changes 1. When no value is specified for ROWS or RANGE clause 2. When RANGE clause is used explicitly with it's default value 3. When ROWS clause is used instead of RANGE clause SELECT Name, Salary, SUM(Salary) OVER(ORDER BY Salary) AS [Default], SUM(Salary) OVER(ORDER BY Salary RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS [Range], SUM(Salary) OVER(ORDER BY Salary ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS [Rows] FROM Employees Text version of the video http://csharp-video-tutorials.blogspot.com/2015/10/difference-between-rows-and-range.html Slides http://csharp-video-tutorials.blogspot.com/2015/10/difference-between-rows-and-range_8.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 32044 kudvenkat
Part 6   Transform rows into columns in sql server
 
08:53
Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/06/part-6-transform-rows-into-columns-in.html This is another common sql server interview question. We will be using Countries table in this example. SQL to create the table Create Table Countries ( Country nvarchar(50), City nvarchar(50) ) GO Insert into Countries values ('USA','New York') Insert into Countries values ('USA','Houston') Insert into Countries values ('USA','Dallas') Insert into Countries values ('India','Hyderabad') Insert into Countries values ('India','Bangalore') Insert into Countries values ('India','New Delhi') Insert into Countries values ('UK','London') Insert into Countries values ('UK','Birmingham') Insert into Countries values ('UK','Manchester') Here is the interview question. Write a sql query to transpose rows to columns. Using PIVOT operator we can very easily transform rows to columns. Select Country, City1, City2, City3 From ( Select Country, City, 'City'+ cast(row_number() over(partition by Country order by Country) as varchar(10)) ColumnSequence from Countries ) Temp pivot ( max(City) for ColumnSequence in (City1, City2, City3) ) Piv
Views: 178878 kudvenkat
Part 5   SQL query to find employees hired in last n months
 
04:53
Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/05/part-5-sql-query-to-find-employees.html This question is asked is many sql server interviews. If you have used DATEDIFF() sql server function then you already know the answer. -- Replace N with number of months Select * FROM Employees Where DATEDIFF(MONTH, HireDate, GETDATE()) Between 1 and N
Views: 161224 kudvenkat
Oracle tutorial : Global Temporary Table In Oracle PL SQL
 
08:49
Oracle tutorial : Global Temporary Table In Oracle PL SQL create temp table sql This video will explain to you how to create Temporary Tables in Oracle Oracle tutorial : Global Temporary Table In Oracle 1)The data in such a table is stored only as long as the session or transaction lasts and is private for each session. 2)The definition is visible to all sessions. 3)After commit or disconnection, the data is lost but the definition of the table remains. 4)Indexes created on a temporary. 5)Scope of TRUNCATE command is a single database session. There is no effect of TRUNCATE on other sessions. 6)Foreign key constraints are not applicable in case of Temporary tables 7)Temporary tables cannot contain column of persistent collection type Syntax : CREATE GLOBAL TEMPORARY TABLE table_name ( column_name column_data_type … … ) ON COMMIT DELETE ROWS; CREATE GLOBAL TEMPORARY TABLE Emp ( id number(5) NOT NULL, name varchar2(50) NOT NULL, city varchar2(50) NOT NULL ) ON COMMIT DELETE ROWS INSERT INTO Emp VALUES (1, ‘Test1’, ‘city1’); INSERT INTO Emp VALUES (2, ‘Test2’, ‘city2’); INSERT INTO Emp VALUES (3, ‘Test3’, ‘city3’); SELECT COUNT(*) FROM emp; Result = 3 rows COMMIT; SELECT COUNT(*) FROM emp; Result = 0 rows For more tutorial please visit #techquerypond https://techquerypond.com https://techquerypond.wordpress.com https://twitter.com/techquerypond
Views: 3731 Tech Query Pond
Getting Unique Records with DISTINCT (Introduction to Oracle SQL)
 
04:22
How to find unique records using the DISTINCT keyword
Views: 83 Database Star
Part 8   SQL Query to find department with highest number of employees
 
04:04
Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/06/part-8-sql-query-to-find-department.html Scenario asked in the SQL Server Interview Based on the above two tables write a SQL Query to get the name of the Department that has got the maximum number of Employees. To answer this question it will be helpful if you the knowledge of JOINS & GROUP BY in SQL Server. We discusses these in Parts 11 & 12 of SQL Server Tutorial video series. SQL query that retrieves the department name with maximum number of employees SELECT TOP 1 DepartmentName FROM Employees JOIN Departments ON Employees.DepartmentID = Departments.DepartmentID GROUP BY DepartmentName ORDER BY COUNT(*) DESC Scenario asked in the SQL Server Interview Based on the above two tables write a SQL Query to get the name of the Department that has got the maximum number of Employees. To answer this question it will be helpful if you the knowledge of JOINS & GROUP BY in SQL Server. We discusses these in Parts 11 & 12 of SQL Server Tutorial video series. SQL query that retrieves the department name with maximum number of employees SELECT TOP 1 DepartmentName FROM Employees JOIN Departments ON Employees.DepartmentID = Departments.DepartmentID GROUP BY DepartmentName ORDER BY COUNT(*) DESC
Views: 111991 kudvenkat
Oracle SQL TUTORIAL – IF condition using CASE and DECODE  - An Example
 
09:31
In this video, we shall see how case and decode is used in real time scenario. SQL used in the video is given below. SELECT * FROM emp_test ORDER BY gender; count_of_employees Count_of_Male_Employees Count OF Female Employees -- 15 5 8 select count(*) " Total Employees" from emp_test; select gender,count(*) " Total Employees" from emp_test group by gender; select sum(decode(gender,'M',1,0)) Count_OF_Male_Employees from emp_test; select sum(case gender when 'F' then 1 else 0 end) as Count_OF_FeMale_Employees from emp_test; SELECT count(*) " Total Employees" , sum(decode(gender,'M',1,0)) Count_OF_Male_Employees, sum(case gender when 'F' then 1 else 0 end) Count_OF_Female_Employees from emp_test;
Views: 17 Ganesh Anbarasu
SQL Server - Retrieve Multiple Rows as a Single Record
 
02:53
A short T-SQL tutorial to show how to join two tables for selecting mutiple rows on a single record. The contents of this video applies to Microsoft® SQL Server®
Views: 15009 Emiliano Musso
Understanding the use of GROUP BY clause in SQL
 
04:39
Join discussion: http://www.techtud.com/video-lecture/understanding-group-clause-sql IMPORTANT LINKS: 1) Official Website: http://www.techtud.com/ 2) Virtual GATE: http://virtualgate.in/login/index.php Both of the above mentioned platforms are COMPLETELY FREE, so feel free to Explore, Learn, Practice & Share! Our Social Media Links: Facebook Page: https://www.facebook.com/techtuduniversity Facebook Group: https://www.facebook.com/groups/virtualgate Google+ Page: https://plus.google.com/+techtud/posts Last but not the least, SUBSCRIBE our YouTube channel to stay updated about the regularly uploaded new videos.
Views: 59211 Techtud
Flashback Query Oracle Database||  Recovery Deleted Row
 
05:41
MD.Rahim Uddin Shohag Founder - Oracle Bangla https://www.oraclebangla.com/ fb :: https://www.facebook.com/oracle.shohag email: [email protected] Recovery Deleted Row in Oracle using Flashback Query ============================================ i'm show you how to recovery Deleted row in oracle database following Step :: ================== /* FLASHBACK QUERY NO NEED DBA */ CREATE TABLE DEMO_CUSTOMER ( CUST_ID NUMBER CONSTRAINT DEMO_CUSPRIMARY PRIMARY KEY, CUST_NAME VARCHAR2(100 BYTE), CUST_ADDRESS VARCHAR2(200 BYTE), CUST_PHONE VARCHAR2(15 BYTE), CUST_WEBSITE VARCHAR2(100 BYTE), CREATE_DATE DATE DEFAULT SYSDATE ); SELECT SYSDATE FROM DUAL; --------------- INSERT RECORD --------- INSERT INTO DEMO_CUSTOMER VALUES(100,'SHOHAG','DHAKA','121212','www.oraclebangla.com',SYSDATE); INSERT INTO DEMO_CUSTOMER VALUES(101,'RAHIM','Feni','121212','www.google.com',SYSDATE); INSERT INTO DEMO_CUSTOMER VALUES(103,'Rubel','karwan bazar','121343','www.obn.com',SYSDATE); INSERT INTO DEMO_CUSTOMER VALUES(104,'Karim','DHAKA','1212432','www.OCA.com',SYSDATE); COMMIT; SELECT * FROM DEMO_CUSTOMER; SELECT COUNT(*) FROM DEMO_CUSTOMER SELECT SYSDATE FROM DUAL; ---- AFTER FEW MINUTE -------- DELETE FROM DEMO_CUSTOMER WHERE CUST_ID = 100; DELETE FROM DEMO_CUSTOMER WHERE CUST_ID = 101; DELETE FROM DEMO_CUSTOMER WHERE CUST_ID = 103; COMMIT; SELECT * FROM DEMO_CUSTOMER; SELECT COUNT(*) FROM DEMO_CUSTOMER -----Way No 1 AFTER 1 MINIUTE ---------- SELECT * FROM DEMO_CUSTOMER AS OF TIMESTAMP (SYSTIMESTAMP -INTERVAL '1' MINUTE) ; SELECT COUNT(*) FROM DEMO_CUSTOMER; SELECT * FROM DEMO_CUSTOMER; /* IF SPECIFIC TIME FINDE DATA HISTORY */ ---- why no 2 SELECT * FROM DEMO_CUSTOMER AS OF TIMESTAMP TO_TIMESTAMP('21-02-2018 04:24:40 PM','DD-MM-RRRR HH:MI:SS AM'); ---============== recovery data ============= SELECT * FROM DEMO_CUSTOMER; --------------------------- SPECIFIC DATA RECOVERY -------------------------- SELECT * FROM DEMO_CUSTOMER AS OF TIMESTAMP (SYSTIMESTAMP -INTERVAL '2' MINUTE); INSERT INTO DEMO_CUSTOMER (SELECT * FROM DEMO_CUSTOMER AS OF TIMESTAMP (SYSTIMESTAMP -INTERVAL '2' MINUTE) WHERE CUST_ID = 101); COMMIT; SELECT * FROM DEMO_CUSTOMER; --- RECOVERY SINGEL RECORD FLASHBACK 2ND WAY SELECT * FROM DEMO_CUSTOMER AS OF TIMESTAMP TO_TIMESTAMP('21-02-2018 04:24:40 PM','DD-MM-RRRR HH:MI:SS AM'); INSERT INTO DEMO_CUSTOMER ( SELECT * FROM DEMO_CUSTOMER AS OF TIMESTAMP TO_TIMESTAMP('21-02-2018 04:24:40 PM','DD-MM-RRRR HH:MI:SS AM') WHERE CUST_ID = 100 ); COMMIT; SELECT * FROM DEMO_CUSTOMER; ---IF YOU RECOVERY DATA ALL DELETE RECORD JUST SIMPLE TECHNIC ----- SELECT * FROM DEMO_CUSTOMER AS OF TIMESTAMP TO_TIMESTAMP('21-02-2018 04:24:40 PM','DD-MM-RRRR HH:MI:SS AM') MINUS SELECT * FROM DEMO_CUSTOMER INSERT INTO DEMO_CUSTOMER( SELECT * FROM DEMO_CUSTOMER AS OF TIMESTAMP TO_TIMESTAMP('21-02-2018 04:24:40 PM','DD-MM-RRRR HH:MI:SS AM') MINUS SELECT * FROM DEMO_CUSTOMER); COMMIT; SELECT * FROM DEMO_CUSTOMER; SELECT COUNT(*) FROM DEMO_CUSTOMER; ------ IF YOU UPDATE RECORD FLASHBACK QUERY CHECK --- UPDATE DEMO_CUSTOMER SET CUST_NAME = 'Oracle' WHERE cust_id = 104; commit; SELECT * FROM DEMO_CUSTOMER; SELECT * FROM DEMO_CUSTOMER AS OF TIMESTAMP TO_TIMESTAMP('21-02-2018 04:24:40 PM','DD-MM-RRRR HH:MI:SS AM') WHERE CUST_ID = 104 SELECT * FROM DEMO_CUSTOMER AS OF TIMESTAMP TO_TIMESTAMP('21-02-2018 04:30:00 PM','DD-MM-RRRR HH:MI:SS AM') WHERE CUST_ID = 104
Views: 590 Oracle Bangla
55. SELECT DISTINCT in SQL (Hindi)
 
03:46
Please Subscribe Channel Like, Share and Comment Visit : www.geekyshows.com
Views: 10261 Geeky Shows
SQL Where clause with example on Oracle 11g Database
 
07:49
SQL Tutorial for beginners in Hindi and English SQL Where clause with example on Oracle 11g Database
PIVOT Tutorial - generating dynamic column with PIVOT Interview Question SQL
 
14:14
In this lecture you will learn about PIVOT operator and using it to generate dynamic columns.PIVOT is very use full operator to convert values into columns. PIVOT: •Convert your output from (values)vertical order to horizontal(making columns) one Topic to cover: •PIVOT example •PIVOT syntax •Interview Question •PIVOT on northwind •Dynamic PIVOT query http://www.techsapphire.in/index/pivot_sql_lesson_with_generating_dynamic_columns_with_pivot/0-158
Views: 27096 techsapphire
SQL Server Management Studio Count Records and Count DISTINCT Records
 
08:02
Ever needed to count a lot of records in your project? In this example, we are going to count 2 sets of records. 1 - Count the amount of times a user has made a comment. 1 - Count the amount of post that the user has commented on. This comes in handy, on sites such as, Forums and such. This example will show you not only how to count records, but will also show you how to create a new Query and how to add tables and use the Group By functions within SQL Server Management Studio. Thank You Wayne Barron http://www.cffcs.com http://www.enterview.org/Coding_Source
Views: 4405 Dark Effects Studios
SQL Like Operator, Use of % and _ operator on Oracle 11g Database
 
11:30
SQL Tutorial for beginners in hindi and English SQL Like Operator, Use of % and _ operator on Oracle 11g Database
PL/SQL tutorial 73: Bulk Collect with SELECT-INTO statement in Oracle Database
 
07:26
RebellionRider.com presents a PL/SQL tutorial on how to use the BULK COLLECT clause with SELECT INTO statement in Oracle Database by Manish Sharma. In this tutorial, you will also learn how to overcome the overhead caused by context switch and improve the query performance. ------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog: http://bit.ly/bulk-collect-2 Previous Tutorial ►Introduction to Bulk Collect: https://youtu.be/CrJSlf_m3yA ►PL/SQL Tutorial 51-Nested Table: https://youtu.be/EUYyiFCzU0I ►Collection Method Count:https://youtu.be/NNq80CcC5K8 ------------------------------------------------------------------------- ►Make sure you SUBSCRIBE and be the 1st one to see my videos! ------------------------------------------------------------------------- ►►►Find me on Social Media◄◄◄ Follow What I am up to as it happens on https://twitter.com/rebellionrider http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ ___Facebook Official Page of Manish Sharma___ https://www.facebook.com/TheRebellionRider/ ___Facebook Official Page of RebellionRider.com___ https://www.facebook.com/RebellionRider.official/ You can also Email me at for E-mail address please check the About section Please please LIKE and SHARE my videos it makes me happy. Thanks for liking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com ♥ I LOVE ALL MY VIEWERS AND SUBSCRIBERS
Views: 8853 Manish Sharma
How to find out Highest ,Second highest Third highest salary and Nth highest salary in SQL Server
 
07:25
A Chanel Where you can learn about Computer Information and Technology Like Asp.Net C#,Asp.Net MVC,SQL Server,Bootstrap,Oracle and more Website design. Website : http://www.dawacit.com Facebook : https://www.facebook.com/dawacit05 Twitter : https://twitter.com/dawacit How to send email in ASP.NET C# using Gmail smtp server step by step https://youtu.be/rnQphXehu7g How to send email with attachment in Asp.Net through Gmail smtp server,simple steps https://youtu.be/mhRe_we4hhA How to create Navigation bar in Asp.Net with CSS https://youtu.be/xVgtAdxhIxk How to create website using ASP.NET very attractive design https://youtu.be/uAKWaCl-vK4 How to create login and logout in Asp.Net MVC https://youtu.be/7E8IK_eAsWE
Views: 27535 Dawa CIT
SQL 099 Column Functions, COUNT or How can I count the number of column rows?
 
02:03
Explains Column Function COUNT or How to count the number of column rows. From http://ComputerBasedTrainingInc.com SQL Course. Learn by doing SQL commands for ANSI Standard SQL, Access, DB2, MySQL, Oracle, PostgreSQL, and SQL Server.
Views: 1119 cbtinc
19 SQL with Oracle 10g XE   Using the COUNT and SUM Functions
 
04:09
19 SQL with Oracle 10g XE Using the COUNT and SUM Functions
Views: 49 Cambo Movies

Sample cover letters for employment gaps in resumes
Futurzwei newsletter formats
Pipefitter cover letter
Dissertation writing service
Personal loan application cover letter