Question

我想编写一个查询并在其中使用子查询，结果集将是某些日期内已售商品的数量。

表格如下：

item_name       sold          date
------------------------------------
A                 20           10.1
B                 10           10.3
A                 10           10.5
C                 20           10.4
A                 30           10.8

，结果集如下：

item_name       sold           date
-------------------------------------
A                 20            10.1
B                 10            10.3
A                 30            10.5
C                 20            10.4
A                 60            10.8

Answer 1

select t1.item_name, sum(t1.sold) as sold, t2.date
from myTable t1
    inner join myTable t2 on (t1.item_name = t2.item_name) and (t1.date <= t2.date)
group by t1.item_name, t2.date

Answer 2

您可以使用以下查询

select t1.item_name,
      (select sum(sold) from table1 t2 where t2.date <= t1.date 
            and t2.item_name = t1.item_name ) as sold,
       t1.date
from table1 t1

不是这么简单...... sql是非常简单的语言......只需要用冷静和冷静的思维来思考你的问题：）

SQL Server查询某些日期的计数已售商品

2 个答案: