为此,您可以将子查询与聚合函数一起使用MAX()
。让我们首先创建一个表-
mysql> create table DemoTable -> ( -> ProductId int, -> ProductAmount int -> );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable values(1001,7895); mysql> insert into DemoTable values(1003,8903); mysql> insert into DemoTable values(1010,7690); mysql> insert into DemoTable values(2010,8450);
使用select语句显示表中的所有记录-
mysql> select *from DemoTable;
这将产生以下输出-
+-----------+---------------+ | ProductId | ProductAmount | +-----------+---------------+ | 1001 | 7895 | | 1003 | 8903 | | 1010 | 7690 | | 2010 | 8450 | +-----------+---------------+ 4 rows in set (0.00 sec)
以下是查询以选择与max()
存在的字段相对应的字段-
mysql> select *from DemoTable -> where ProductAmount=( select max(ProductAmount) from DemoTable);
这将产生以下输出-
+-----------+---------------+ | ProductId | ProductAmount | +-----------+---------------+ | 1003 | 8903 | +-----------+---------------+ 1 row in set (0.05 sec)