MySQL ORDER BY具有自定义字段值
要设置自定义字段值，请使用FIND_IN_SET()。让我们首先创建一个表-
mysql> create table DemoTable677( UserId int NOT NULL AUTO_INCREMENT PRIMARY KEY, UserStatus text );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable677(UserStatus) values('BUSY');
mysql> insert into DemoTable677(UserStatus) values('AT WORK');
mysql> insert into DemoTable677(UserStatus) values('OFFLINE');
mysql> insert into DemoTable677(UserStatus) values('BLOCKED');使用select语句显示表中的所有记录-
mysql> select *from DemoTable677;
这将产生以下输出-
+--------+------------+ | UserId | UserStatus | +--------+------------+ | 1 | BUSY | | 2 | AT WORK | | 3 | OFFLINE | | 4 | BLOCKED | +--------+------------+ 4 rows in set (0.00 sec)
以下是使用自定义字段值对ORDERBY的查询-
mysql> select *from DemoTable677 ORDER BY FIND_IN_SET(UserStatus, 'BLOCKED,AT WORK,OFFLINE,BUSY');
这将产生以下输出-
+--------+------------+ | UserId | UserStatus | +--------+------------+ | 4 | BLOCKED | | 2 | AT WORK | | 3 | OFFLINE | | 1 | BUSY | +--------+------------+ 4 rows in set (0.03 sec)