mysql查询时区分大小写

mysql查询时不区分大小写，怎么区分大小写呢，我和大师分享一下方式，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！

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工具/原料

mysql5.6

方式/步骤

1
登录mysql，在test数据库中新建一个表：
CREATE TABLE `chengshi` ( `id` int(11) NOT NULL AUTO_INCREMENT, `shengfen` varchar(10) NOT NULL, `chengshi` varchar(10) NOT NULL, `shijian` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, `zhujima` varchar(10) NOT NULL DEFAULT 'binary', PRIMARY KEY (`id`), UNIQUE KEY `chengshi` (`chengshi`)) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8
2
在表中增添一些数据：
insert into `chengshi` (`id`, `shengfen`, `chengshi`, `shijian`, `zhujima`) values('1','河南','安阳','2019-03-14 09:57:29','ay');
insert into `chengshi` (`id`, `shengfen`, `chengshi`, `shijian`, `zhujima`) values('2','河南','郑州','2019-03-14 10:10:02','zz');
insert into `chengshi` (`id`, `shengfen`, `chengshi`, `shijian`, `zhujima`) values('3','河南','洛阳','2019-03-14 10:10:56','ly');
insert into `chengshi` (`id`, `shengfen`, `chengshi`, `shijian`, `zhujima`) values('4','河南','漯河','2019-03-05 10:14:27','');
insert into `chengshi` (`id`, `shengfen`, `chengshi`, `shijian`, `zhujima`) values('5','河南','新乡','2019-03-05 10:14:27','');
insert into `chengshi` (`id`, `shengfen`, `chengshi`, `shijian`, `zhujima`) values('6','河南','濮阳','2019-03-05 10:14:27','');
insert into `chengshi` (`id`, `shengfen`, `chengshi`, `shijian`, `zhujima`) values('7','河南','焦作','2019-03-05 10:14:27','');
insert into `chengshi` (`id`, `shengfen`, `chengshi`, `shijian`, `zhujima`) values('8','河南','鹤壁','2019-03-05 10:14:27','');
insert into `chengshi` (`id`, `shengfen`, `chengshi`, `shijian`, `zhujima`) values('9','河南','开封','2019-03-05 10:14:27','');
3
在表中查询"安阳“的记实助记码是小写：
SELECT * FROM chengshi WHERE zhujima='ay';
4
在表中查询"安阳“的记实助记码是大写：
SELECT * FROM chengshi WHERE zhujima='AY';
查询时默认是区分大小写的。
5
查询区分大小写，没有查询安阳的记实：
SELECT * FROM chengshi WHERE BINARY zhujima='AY';
6
查询区分大小写，若是换当作小写查询安阳的记实当作功：
SELECT * FROM chengshi WHERE BINARY zhujima='ay';