MySQL查询将来自相同列的相同客户的产品价格值求和，并将结果显示在同一列中
为此，将SUM()与GROUPBY一起使用。让我们首先创建一个表-
create table DemoTable ( CustomerName varchar(100), Product_1_Price int, Product_2_Price int );
使用插入命令在表中插入一些记录-
insert into DemoTable values('John',67,89);
insert into DemoTable values('David',769,890);
insert into DemoTable values('David',987,1000);
insert into DemoTable values('John',900,111);使用select语句显示表中的所有记录-
select *from DemoTable;
这将产生以下输出-
+--------------+-----------------+-----------------+ | CustomerName | Product_1_Price | Product_2_Price | +--------------+-----------------+-----------------+ | John | 67 | 89 | | David | 769 | 890 | | David | 987 | 1000 | | John | 900 | 111 | +--------------+-----------------+-----------------+ 4 rows in set (0.00 sec)
以下是对值求和并显示相同客户的结果的查询-
select CustomerName,SUM(Product_1_Price) AS Total1,SUM(Product_2_Price) As Total2 from DemoTable group by CustomerName;
这将产生以下输出-
+--------------+--------+--------+ | CustomerName | Total1 | Total2 | +--------------+--------+--------+ | John | 967 | 200 | | David | 1756 | 1890 | +--------------+--------+--------+ 2 rows in set (0.00 sec)