在数据库中怎么把一个记实字段值赋值给变量呢，我和大师分享一下select into用法，我写的经验对你进修mysql有帮忙的话，给我投票、点赞或者保藏！
工具/原料
- mysql5.6
方式/步骤
- 1
登录mysql中，在test数据库新建一个表：
CREATE TABLE `shoufei` ( `id` int(11) NOT NULL AUTO_INCREMENT, `shijian` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, `xiangmu` varchar(20) NOT NULL, `jiage` float NOT NULL, `shuliang` int(11) NOT NULL, `jine` float DEFAULT NULL, PRIMARY KEY (`id`)) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8
- 2
在表中增添一些数据：
insert into `shoufei` (`id`, `shijian`, `xiangmu`, `jiage`, `shuliang`, `jine`) values('1','2019-01-28 11:15:52','银翘解毒丸','2','10','20');
insert into `shoufei` (`id`, `shijian`, `xiangmu`, `jiage`, `shuliang`, `jine`) values('2','2019-01-28 11:15:59','甘草片','20','2','30');
insert into `shoufei` (`id`, `shijian`, `xiangmu`, `jiage`, `shuliang`, `jine`) values('3','2019-01-28 11:16:04','阿莫西林','20','2','40');
insert into `shoufei` (`id`, `shijian`, `xiangmu`, `jiage`, `shuliang`, `jine`) values('4','2019-01-28 11:16:08','午时茶','8','1','8');
insert into `shoufei` (`id`, `shijian`, `xiangmu`, `jiage`, `shuliang`, `jine`) values('5','2019-01-28 11:16:12','银翘解毒丸','2','10','20');
- 3
把id=2的记实，xiangmu字段值赋值给@xm用户变量，而且显示@xm值；
SELECT xiangmu INTO @xm FROM shoufei WHERE id=2;
SELECT @xm;
- 4
把id=3的记实，xiangmu、jiage字段值赋值@xm、@jg,而且显示.
SELECT xiangmu ,jiage INTO @xm,@jg FROM shoufei WHERE id=3;
SELECT @xm,@jg;
- 5
把id=4的记实，计较出金额：
SELECT xiangmu ,jiage*shuliang INTO @xm,@je FROM shoufei WHERE id=4;
SELECT @xm,@je;
- 6
把id=5的记实，挂号时候赋值给 @lr:
SELECT CONCAT(shijian,xiangmu) INTO @lr FROM shoufei WHERE id=5;
SELECT @lr;
