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从MySQL中的记录返回最大值

2024-05-10 02:49:03 413

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)

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从MySQL中的记录返回最大值

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