Select into in sql server

Posted by On April 26, 2019 0 Comment

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In this video we will discuss the power and use of SELECT INTO statement in SQL Server.

The SELECT INTO statement in SQL Server, selects data from one table and inserts it into a new table.

SELECT INTO statement in SQL Server can do the following
1. Copy all rows and columns from an existing table into a new table. This is extremely useful when you want to make a backup copy of the existing table.
SELECT * INTO EmployeesBackup FROM Employees

2. Copy all rows and columns from an existing table into a new table in an external database.
SELECT * INTO HRDB.dbo.EmployeesBackup FROM Employees

3. Copy only selected columns into a new table
SELECT Id, Name, Gender INTO EmployeesBackup FROM Employees

4. Copy only selected rows into a new table
SELECT * INTO EmployeesBackup
FROM Employees WHERE DeptId = 1

5. Copy columns from 2 or more table into a new table
SELECT * INTO EmployeesBackup
FROM Employees
INNER JOIN Departments
ON Employees.DeptId = Departments.DepartmentId

6. Create a new table whose columns and datatypes match with an existing table.
SELECT * INTO EmployeesBackup
FROM Employees WHERE 1 = 2

7. Copy all rows and columns from an existing table into a new table on a different SQL Server instance. For this, create a linked server and use the 4 part naming convention
SELECT * INTO TargetTable
FROM [SourceServer].[SourceDB].[dbo].[SourceTable]

Please note : You cannot use SELECT INTO statement to select data into an existing table. For this you will have to use INSERT INTO statement.

INSERT INTO ExistingTable (ColumnList)
SELECT ColumnList FROM SourceTable

Text version of the video
http://csharp-video-tutorials.blogspot.com/2015/09/select-into-in-sql-server.html

Slides
http://csharp-video-tutorials.blogspot.com/2015/09/select-into-in-sql-server_14.html

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