MySQL查询求和具有重复对应ID的行
总而言之，您可以使用聚合函数SUM()。让我们首先创建一个表-
mysql> create table DemoTable850( Id int, Price int );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable850 values(1,90); mysql> insert into DemoTable850 values(2,100); mysql> insert into DemoTable850 values(2,50); mysql> insert into DemoTable850 values(1,80); mysql> insert into DemoTable850 values(1,60);
使用select语句显示表中的所有记录-
mysql> select *from DemoTable850;
这将产生以下输出-
+------+-------+ | Id | Price | +------+-------+ | 1 | 90 | | 2 | 100 | | 2 | 50 | | 1 | 80 | | 1 | 60 | +------+-------+ 5 rows in set (0.00 sec)
以下是对具有重复值的行求和的查询-
mysql> select Id,SUM(Price) from DemoTable850 where Id=1;
这将产生以下输出-
+------+------------+ | Id | SUM(Price) | +------+------------+ | 1 | 230 | +------+------------+ 1 row in set (0.00 sec)