MySQL ORDER BY 对某些值采用不同的排序方式(降序排列，其他值则采用升序排列)?
mysqlmysqli database
您可以使用 field() 来实现这一点。让我们首先创建一个表 −
mysql> create table DemoTable ( Value int ); Query OK, 0 rows affected (0.80 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable values(10); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values(70); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(60); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(56); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(81); Query OK, 1 row affected (0.44 sec) mysql> insert into DemoTable values(85); Query OK, 1 row affected (0.15 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable;
输出
+-------+ | Value | +-------+ | 10 | | 70 | | 60 | | 56 | | 81 | | 85 | +-------+ 6 rows in set (0.00 sec)
以下查询按特定 3 个值按降序排列，其余值按升序排列 −
mysql> select *from DemoTable order by field(Value,60,70,81) desc;
输出
+-------+ | Value | +-------+ | 81 | | 70 | | 60 | | 10 | | 56 | | 85 | +-------+ 6 rows in set (0.00 sec)
