


Removing the IDENTITY Property in SQL Server
Problem: Removing the IDENTITY
property from a column in a large SQL Server table via SSMS can lead to timeouts. Is there a T-SQL solution?
Solution: Directly removing the IDENTITY
property after it's been set is not possible using T-SQL.
Removing the Entire Column: The simplest solution, if the data isn't needed, is to drop the column:
ALTER TABLE yourTable DROP COLUMN yourColumn;
Data Preservation Method: To retain the data, follow these steps:
-
Create a new column: Add a new column without the
IDENTITY
property. -
Transfer data: Copy the data from the old
IDENTITY
column to the new column. -
Drop the old column: Remove the original
IDENTITY
column. - Rename the new column: Change the name of the new column to match the old column's name.
Summary: There's no direct way to remove the IDENTITY
property. The best approach depends on whether you need to preserve the existing data. Dropping the column is efficient if data retention isn't a requirement; otherwise, the alternative method ensures data is safely transferred.
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