MySQL IF / WHEN / ELSE / OR与ORDER BY FIELD
让我们首先创建一个表-
mysql> create table DemoTable1884 ( Marks int );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable1884 values(55); mysql> insert into DemoTable1884 values(97); mysql> insert into DemoTable1884 values(79); mysql> insert into DemoTable1884 values(87);
使用插入命令在表中显示一些记录-
mysql> select * from DemoTable1884;
这将产生以下输出-
+-------+ | Marks | +-------+ | 55 | | 97 | | 79 | | 87 | +-------+ 4 rows in set (0.00 sec)
这是field()使用OR实施订单的查询：
mysql> select * from DemoTable1884 where Marks = 98 or Marks = 87 order by field(Marks,98,87) limit 1;
这将产生以下输出-
+-------+ | Marks | +-------+ | 87 | +-------+ 1 row in set (0.00 sec)