SQL Server - SQL - Alter or add a column - SQLInfo.net - SQL Information, Examples, and Resources fo

SQL Server - SQL - Alter or add a column - SQLInfo.net - SQL Information, Examples, and Resources fo

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日期:2025-05-12
Adding column You can add new columns to an existing table. . ALTER TABLE [dbo].[phone] ADD inactive_date DATETIME NULL GO Alter column You can add modify an existing column ALTER TABLE [dbo].[person] ALTER COLUMN [lastname] VARCHAR ......看更多