saving changes is not permitted.The changes you have made require the following tables to...

修改数据库时，提示：
saving changes is not permitted.The changes you have made require the following tables to be dropd and re-created.You have either made changes to a table that can’t be re-created or enabled the option Prevent saving changes that require the table to be re-vreated.

解决方法：不要捉急，这是因为你设置了保存修改时重建表（一般是默认的）

1.回到SQL Server Studio(SSMS)首页。

2. 选择Tools–>Options–>Designers–>Table and Database Designers ,去掉Prevent saving changes that require table re-creation .