有哪位大虾知道sp_prepexec存储过程是做什么用的吗？SQLServer的帮助里找不到呀！
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When you use EXEC statement, behind the scenes, three system internal stored procedures: sp_prepexec, sp_execute, and sp_unprepare are called
From the name, you can tell that sp_prepexec is used to prepare dynamic SQL on the server, which speeds up subsequent executions of the same statement