Question

我有以下两个查询：

SELECT globalid, name, price, sum(qnt) as pozitive 
from main 
where [date-out] is null 
group by globalid, name, price;

此查询提供两种日期中不同项目的数量总和，日期创建和日期 - 。

SELECT globalid,  sum(qnt) as negative
from main 
where [date-out] is not null 
group by globalid;

此查询提供 date-out -s中不同商品的存储量。

我想创建一个包含以下字段的DataSet：

globalid - 名称 - 价格 - 库存 - 已售出 - 总

我在网上找到了一些例子但是，它们主要是使用count函数，或者如果使用sum，只有一个查询有条件，而不是两者。我正在使用SQL Server，感谢任何帮助。

Answer 1

似乎您可以将CASE与SUM一起使用 - 不需要任何子查询：

SELECT 
    globalid, 
    name,
    price,
    sum(case when [date-out] is null then qnt end) positive,
    sum(case when [date-out] is not null then qnt end) negative,
    sum(qnt) total
from main
group by
    globalid, 
    name,
    price

Answer 2

select x.globalid, x.name, x.price, x.positive as [in stock], x.negative as [sold], x.positive + x.negative as [total]
from
(
SELECT globalid,  
           name, 
          price,
   sum(case when [date-out] is not null then qnt else 0 end) as negative,
   sum(case when [date-out] is null then qnt else 0 end) as positive 
from main 
where [date-out] is not null 
group by globalid, name, price
) as x

从同一个表上的2个部分中减去两个不同的列

2 个答案: