Add a column if it doesn't exist to all tables?

Question

I\'m using SQL Server 2005/2008. I need to add a column to a table if it does not yet exist. This will apply to all tables in a given database. I hoped I was close, but I\'m h

Answer 1

DECLARE @Column VARCHAR(100) = 'Inserted_date'
DECLARE @sql VARCHAR(max) = NULL

SELECT @sql += ' ALTER TABLE ' + QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME) + 'ADD' + @Column + 'datetime NOT NULL DEFAULT getdate()' + '; '
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_TYPE = 'BASE TABLE'
    AND TABLE_NAME IN (
        SELECT DISTINCT NAME
        FROM SYS.TABLES
        WHERE type = 'U'
            AND Object_id IN (
                SELECT DISTINCT Object_id
                FROM SYS.COLUMNS
                WHERE NAME != @Column
                )
        )
EXEC Sp_executesql @sql