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MySQL查询按列分组并在另一列中显示相似值的总和

2024-05-09 09:20:04 421

为此，请使用GROUPBYHAVING子句。

让我们首先创建一个表-

mysql> create table DemoTable782 (
   Name varchar(100),
   Score int
);

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable782 values('John',156);
mysql> insert into DemoTable782 values('Carol',250);
mysql> insert into DemoTable782 values('Bob',140);
mysql> insert into DemoTable782 values('John',126);
mysql> insert into DemoTable782 values('John',140);
mysql> insert into DemoTable782 values('Bob',280);
mysql> insert into DemoTable782 values('Bob',250);
mysql> insert into DemoTable782 values('Carol',189);
mysql> insert into DemoTable782 values('Carol',299);

使用select语句显示表中的所有记录-

mysql> select *from DemoTable782;

这将产生以下输出-

+-------+-------+
| Name  | Score |
+-------+-------+
| John  | 156   |
| Carol | 250   |
| Bob   | 140   |
| John  | 126   |
| John  | 140   |
| Bob   | 280   |
| Bob   | 250   |
| Carol | 189   |
| Carol | 299   |
+-------+-------+
9 rows in set (0.00 sec)

以下是按列分组并显示相似值之和的查询-

mysql> select Name,SUM(Score) AS Total
   from DemoTable782
   group by Name
   HAVING Total > 500;

这将产生以下输出-

+-------+-------+
| Name  | Total |
+-------+-------+
| Carol | 738   |
| Bob   | 670   |
+-------+-------+
2 rows in set (0.00 sec)

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MySQL查询按列分组并在另一列中显示相似值的总和

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