MySQL 存储过程中执行动态SQL语句的方法
dropPROCEDUREifexistsmy_procedure;createPROCEDUREmy_procedure()BEGINdeclaremy_sqllvarchar(500);setmy_sqll='select*fromaa
动态SQL
dropPROCEDUREifexistsmy_procedure;createPROCEDUREmy_procedure()BEGINdeclaremy_sqllvarchar(500);setmy_sqll='select*fromaa