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。