sql语句执行的时候要先编译，然后执行。存储过程就是编译好了的一些sql语句。用的时候直接就可以用了，所以效率会高。 存储过程的优点 存储过程是由流控制和SQL语句书写的过程-sql statement is executed when the first compile and then execute. Stored procedure is compiled of some of the sql statements. When used directly on the can, so efficiency will be high. The advantage of stored procedure stored procedure is a flow control and the process of writing SQL statements