从MySQL中的记录返回最大值
让我们首先创建一个表-
mysql> create table DemoTable1449 -> ( -> PlayerId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> PlayerScore int -> );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable1449(PlayerScore) values(1040); mysql> insert into DemoTable1449(PlayerScore) values(1450); mysql> insert into DemoTable1449(PlayerScore) values(1890); mysql> insert into DemoTable1449(PlayerScore) values(1650);
使用select语句显示表中的所有记录-
mysql> select * from DemoTable1449;
这将产生以下输出-
+----------+-------------+ | PlayerId | PlayerScore | +----------+-------------+ | 1 | 1040 | | 2 | 1450 | | 3 | 1890 | | 4 | 1650 | +----------+-------------+ 4 rows in set (0.00 sec)
以下是从记录返回最大值的查询-
mysql> select PlayerId,PlayerScore from DemoTable1449 -> where PlayerScore=( select max(PlayerScore) PlayerScore from DemoTable1449);
这将产生以下输出-
+----------+-------------+ | PlayerId | PlayerScore | +----------+-------------+ | 3 | 1890 | +----------+-------------+ 1 row in set (0.00 sec)