-- Disable the constraints on a table called tableName: ALTER TABLE tableName NOCHECK CONSTRAINT ALL -- Re-enable the constraints on a table called tableName: ALTER TABLE tableName WITH CHECK CHECK CONSTRAINT ALL --------------------------------------------------------- -- Disable constraints for all tables in the database: EXEC sp_msforeachtable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL' -- Re-enable constraints for all tables in the database: EXEC sp_msforeachtable 'ALTER TABLE ? WITH CHECK CHECK CONSTRAINT ALL' ---------------------------------------------------------