这是我项目当中用到的，用作参考使用：
DELIMITER $$DROP PROCEDURE IF EXISTS `gpsdata`.`sp_test`$$CREATE DEFINER=`root`@`localhost` PROCEDURE `sp_test`( gpstime_ varchar(128), gpsname_ varchar(128), gpsinfo_ varchar(256))BEGINDECLARE tbname varchar(50) DEFAULT '0';DECLARE v_sql varchar(1024) DEFAULT '0';SET v_sql=CONCAT('select * from ', tbname ,' where gpsname = ',gpsname_,' order by gpstime desc limit 1');SET @lastdata = v_sql;PREPARE lastdata FROM @lastdata; EXECUTE lastdata;DEALLOCATE PREPARE lastdata; select v_sql;END$$DELIMITER ;