ALTER TABLE companies ADD COLUMN IF NOT EXISTS primary_color VARCHAR(7) DEFAULT '#FF8C42'; -- Add created_at if missing (backfill with NOW() for existing rows) ALTER TABLE companies ADD COLUMN IF NOT ...

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Modifies a column's values in existing rows of a table or view. Restriction: You cannot use UPDATE on a table accessed via an engine that does not support UPDATE processing. You can update one or more ...

Arthur Fuller explores the value of identity columns and the usefulness of their arbitrary values and discusses ways to use SQL Server 2000's IDENTITY_INSERT setting. Despite your numerous ...