组装sql字符串，丢给exec sp_executesql执行
exec sp_executesql N'exec sp_executesql N''select * from TESTTEST.dbo.Employees where Title=@title'', N''@title varchar(30)'', @title=''Employee'''
注意：这里是执行一个带有输入参数的sql语句，用两层exec sp_executesql嵌套实现
转载于:https://www.cnblogs.com/icyJ/p/4556383.html
