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Scripting schema updates in MSSQL #1

This SQL statement will alter a table only if a column in the table to be altered does NOT contain a column named 'FavoriteColorId'.

From: http://haacked.com/

IF NOT EXISTS
(
    SELECT * FROM [information_schema].[columns]
    WHERE    table_name   = 'Customer'
    AND      table_schema = 'dbo'
    AND      column_name  = 'FavoriteColorId'
)
BEGIN
    ALTER TABLE [dbo].[Customer]
    ADD FavoriteColorId int

to sql tsql database mssql schema update tables microsoft columns query scripting information_schema alter altering by chrelad on Aug 08, 2007 1 Comments

Retrieve MSSQL table information

Retrieve tons of information (length, data type, name, etc.) of columns for a table. Works in (T|MS)SQL (all I've tested it in).

SELECT * FROM information_schema.columns WHERE table_name = 'Customers'

to sql server tsql mssql table microsoft column information properties sysproperties systables data type types length columns by chrelad on Aug 08, 2007