动态sql的两种执行方式execute-sp_executesql

execute

execute (N'select * from Student')--正确
execute ('select * from Student')--正确
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sp_executesql

sp_executesql N'select * from Student'--正确
sp_executesql 'select * from Student'--错误     sp_executesql 只能执行Unicode或能够隐式转换为ntext的字符串常量、变量。