Mysql 临时表的创建和删除

    DROP temporary TABLE IF EXISTS Temporary_T;
    create temporary table if not exists Temporary_T(id int );

 

　　IF NOT EXISTS ：是说如果你的临时表如‘Temporary_T’不存在就创建临时表

　　alter table Temporary_T add d0 DECIMAL 添加一个字段

 

USE `jj`;
DROP procedure IF EXISTS `Day`;
DELIMITER $$
USE `jj`$$
CREATE DEFINER=`root`@`localhost` PROCEDURE `Day`(in ID int,in d1 datetime,in d2 datetime)

BEGIN

    DROP temporary TABLE IF EXISTS Temporary_T;
    create temporary table if not exists Temporary_T(id int );
    alter table Temporary_T add d0 DECIMAL;
    select * from Temporary_T;
    DROP TEMPORARY TABLE IF EXISTS Temporary_T;

END$$
DELIMITER ;