動態sql的兩種執行方式execute-sp_executesql

execute

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

sp_executesql N'select * from Student'--正確
sp_executesql 'select * from Student'--錯誤     sp_executesql 只能執行Unicode或能夠隱式轉換爲ntext的字符串常量、變量。