How to Drop Identity Property of a Column in SQL Server Table - SQL Server / T-SQL Tutorial 44

In this post we will learn how to drop identity property of a column in SQL Server Table.

We will follow below steps.

• Add a new column with TestID to existing Table
• Update the records from Id ( Identity enable Column) to TestID (Newly Added) Column.
• Drop the Id ( Identity Enable Column) from Table
• Rename the Newly Added Column ( TestID) to Id.

--Create Table with Identity Property
CREATE TABLE dbo.Employee ( Id INT IDENTITY(1,1), Name VARCHAR(10))
GO

--Insert the record after creating Table with Identity Property on Id Column
INSERT INTO dbo.Employee 
VALUES('Shahzad')
GO

--Run to See the Data
SELECT * FROM dbo.Employee

--Find out all the columns for all the tables on which Identity Property is enabled
SELECT OBJECT_NAME(OBJECT_ID) AS TableName,name AS ColumnName FROM sys.columns
WHERE is_identity=1

/** Drop Identity ********/
--Add a new column with any name
ALTER TABLE dbo.Employee
ADD TestId INT

--Update the Records in newly Added column , in our case TestID
UPDATE dbo.Employee
SET TestId=Id

--Drop Identity Column
ALTER TABLE dbo.Employee
DROP COLUMN Id

--Rename the newly Added Column to Identity Column you had at first.
EXEC sp_rename 'dbo.Employee.TestId','Id','COLUMN'             

Video Demo : How to drop Identity Property of a Column in SQL Server Table