在mysql语句中组合Concat

Question

我有一张名为delitems的表，里面有一些列。

在我的SELECT声明中，我想使用GROUP_CONCAT：

 +-------------------------------+-------+--------+--------+-----+
 | COLOR                         | tOTAL | Ptotal | Amount | qty |
 +-------------------------------+-------+--------+--------+-----+
 | BLUE - W = 55,BLUE - W/O = 93 |   148 |    375 |  55500 |   2 |
 +-------------------------------+-------+--------+--------+-----+
 mysql>select GROUP_CONCAT(color,' = ',qty) as COLOR, SUM(qTY) AS tOTAL, suM(p_cost)  as Ptotal, SUM(qty)*SUM(p_cost) as Amount,count(*) qty from delitems where status='3' Group By cont_no;

除Amount列之外，一切正常。总金额错了！这是正确的值：

+-----------------+-------+--------+--------+-----+
| COLOR           | tOTAL | Ptotal | Amount | qty |
+-----------------+-------+--------+--------+-----+
| BLUE - W = 55   |    55 |    125 |   6875 |   1 |
| BLUE - W/O = 93 |    93 |    250 |  23250 |   1 |
+-----------------+-------+--------+--------+-----+
mysql>select GROUP_CONCAT(color,' = ',qty) as COLOR, SUM(qTY) AS tOTAL, suM(p_cost) as Ptotal, SUM(qty)*SUM(p_cost) as Amount,count(*) qty from delitems where status='3' Group By color;

我只想在一行中显示正确的总金额

请帮忙。

Answer 1

你应该需要总和（a * b）而不是总和（a）*总和（b）

select 
   GROUP_CONCAT(color,' = ',qty) as COLOR
 , SUM(qTY) AS tOTAL
 , suM(p_cost)  as Ptotal
 , SUM(qty*(p_cost) as Amount, count(*) qty 
from delitems 
where status='3' Group By cont_no;