Question

我有一个SQL表“ITM_SLS”，其中包含以下字段：

ITEM
DESCRIPTION
TRANSACTION #
DATE
QTY SOLD

我希望能够输出QTY SOLD一个月的值和一年的日期值，以便输出看起来像这样：

ITEM, DESCRIPTION, QTY SOLD MONTH, QTY SOLD YEAR TO DATE

这可能吗？

Answer 1

您可以使用子查询中的group by计算销售总量。例如

select a.Item, a.Description, b.MonthQty, c.YearQty
from (
    select distinct Item, Description from TheTable
) a
left join (
    select Item, sum(Qty) as MonthQty
    from TheTable 
    where datediff(m,Date,getdate()) <= 1
    group by Item
) b on a.Item = b.Item
left join (
    select Item, sum(Qty) as YearQty
    from TheTable 
    where datediff(y,Date,getdate()) <= 1
    group by Item
) c on a.Item = c.Item

将子查询限制为特定日期范围的方法因DBMS而异，此示例使用SQL Server datediff函数。

Answer 2

假设“一个月”是上个月......

select item
       , description
       , sum (case when trunc(transaction_date, 'MM') 
                           = trunc(add_months(sysdate, -1), 'MM') 
                   then qty_sold
                   else 0
                   end) as sold_month
       , sum(qty_sold) as sold_ytd
from itm_sls
where transaction_date >= trunc(sysdate, 'yyyy')
group by item, description
/

Answer 3

这将让您了解自己可以做些什么：

select 
    ITEM,
    DESCRIPTION, 
    QTY SOLD as MONTH, 
    ( select sum(QTY SOLD)
      from ITM_SLS
      where ITEM = I.ITEM
        AND YEAR = i.YEAR
     ) as YEAR TO DATE
from ITM_SLS I

为不同的日期范围输出两列1个字段？

3 个答案: