Question

我有一个相当简单的查询，可以在DB2中正确执行，但是在弄清楚如何对结果进行分组以给我2列时遇到麻烦替换2个不同行的列的值。换句话说，对于每种产品，我都会得到2行（一个具有有效价格，一个具有临时价格）但我想这样做，以便获得一个不同的产品行，其中每种价格类型和价格都有一个列

查询：

    select distinct grouping, body, fabric,color,thread,detail, category,p.priceType,p.price
    from ordering offs
    inner join pricing p
    on offs.body = p.bodyp
    where priceType in ('Active','Temporary')
    and offs.category in ('A','B','C');

我得到的是什么

    grouping  |  body  |  fabric  |  color  |  thread  |  detail  |  category  |  p.priceType  |  price
    -----------------------------------------------------------------------------------------------------
    ABC          123        1234       Blue     1.1       1           TEXTILE       Active          594.00
    ABC          123        1234       Blue     1.1       1           TEXTILE       Temporary       560.00
    ABC          123        1234       Red      0.5       0           TEXTILE       Active          584.00
    ABC          123        1234       Red      0.5       0           TEXTILE       Temporary       550.00
    ABC          123        1234       Grn      3.3       12          TEXTILE       Active          594.00
    ABC          123        1234       Grn      3.3       12          TEXTILE       Temporary       560.00

我想要得到什么：

    grouping  |  body  |  fabric  |  color  |  thread  |  detail  |  category  |  ActivePrice  |  TemporaryPrice
    ------------------------------------------------------------------------------------------------------------
    ABC          123        1234       Blue     1.1       1           TEXTILE       594.00            560.00
    ABC          123        1234       Red      0.5       0           TEXTILE       584.00            550.00
    ABC          123        1234       Grn      3.3       12          TEXTILE       594.00            560.00

Answer 1

一种简单的方法使用条件聚合：

select grouping, body, fabric, color, thread, detail, category, 
      max(case when p.priceType = 'Active' then p.price end) as active_price,
      max(case when p.priceType = 'Temporary' then p.price end) as temporary_price
from ordering offs inner join
     pricing p
     on offs.body = p.bodyp
where priceType in ('Active', 'Temporary') and
      offs.category in ('A', 'B', 'C')
group by grouping, body, fabric, color, thread, detail, category;

将多行的db2结果分组，以给出不同结果的列

1 个答案: