sql server如何禁用与启用表和数据库的所有约束

-- Disable all table constraints
ALTER TABLE YourTableName NOCHECK CONSTRAINT ALL
-- Enable all table constraints
ALTER TABLE YourTableName CHECK CONSTRAINT ALL
-- ----------
-- Disable single constraint
ALTER TABLE YourTableName NOCHECK CONSTRAINT YourConstraint
-- Enable single constraint
ALTER TABLE YourTableName CHECK CONSTRAINT YourConstraint
-- ----------
-- Disable all constraints for database
EXEC sp_msforeachtable "ALTER TABLE ? NOCHECK CONSTRAINT all"
-- Enable all constraints for database
EXEC sp_msforeachtable "ALTER TABLE ? WITH CHECK CHECK CONSTRAINT all"