清空一个数据库中所有数据

微软不公开的存储过程 ，代码如下：
--Removed CHECK Constraint-------------------------
EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL' --NOCHECK Constraints
print 'All Constraints Disable'
go

--truncate All tables if trying to empty the database
--- Ensure the T_X_ref database is located on a different database

------------- Truncate All Tables from Model ----------------
-----To limit tables a table with sub model tables must be created and used joins-----
EXEC sp_MSForEachTable 'truncate TABLE ? '
print 'All tables truncated'
go