如何在MySQL中搜索完全匹配的字符串值？

要搜索完全匹配的字符串值，请使用COLLATE的概念。让我们首先创建一个表−

mysql> create table DemoTable1620
    -> (
    -> Subject varchar(20)
    -> );
Query OK, 0 rows affected (0.42 sec)

使用插入命令在表中插入一些记录−

mysql> insert into DemoTable1620 values('mysql');
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable1620 values('MySql');
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable1620 values('mYSQL');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable1620 values('MySQL');
Query OK, 1 row affected (0.26 sec)
mysql> insert into DemoTable1620 values('MYSQL');
Query OK, 1 row affected (0.20 sec)

使用select语句显示表中的所有记录−

mysql> select * from DemoTable1620;

这将产生以下输出−

+---------+
| Subject |
+---------+
| mysql   |
| MySql   |
| mYSQL   |
| MySQL   |
| MYSQL   |
+---------+
5 rows in set (0.00 sec)

以下是在MySQL中搜索完全匹配字符串值的查询−

mysql> select * from DemoTable1620 where Subject collate utf8_bin = 'MySQL';

这将产生以下输出−

+---------+
| Subject |
+---------+
| MySQL   |
+---------+
1 row in set (0.00 sec)

阅读更多：MySQL 教程