SQLServer强制保存

当你把nvarchar(200)改成nvarchar(100)的时候，可能会报错：

Saving changes is not permitted. The changes you have made require the following tables to be dropped 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-created.

大意是说：

不允许保存修改，您所做的更改要求删除并重新创建以下表。您对无法重新创建的表进行了更改或者启用了“组织保存要求重新创建表的更改”选项。

解决方案如下：

Tools->Options->Designers->Prevent saving changes that require table re-creation（阻止保存要求重新创建表的更改）

去掉前面的勾即可。