Question

我有一个查询，我有一个SQL数据库。我的数据看起来像这样

Select ROW_NUMBER() OVER (PARTITION BY m.[MKEY] ORDER BY es.[FDATE]) as 'Row', FDATE
    PIVOT(
    SUM(s.[EARNINGS])   
    FOR s.[row] IN ([1], [2], [3], [4] ))AS i






Person   |   FDATE| 1      | 2     | 3     | 4
Sam Smith|   2001 | 200.00 | Null  | Null  | Null
Sam Smith|   2002 | Null   | 400.00| Null  | Null
Sam Smith|   2003 | Null   | Null  | 500.00| Null

我希望像这样

Person    |  FDATE| 1      |FDATE| 2    |FDATE| 3     |FDATE| 4
Sam Smith | 2001 | 200.00 | 2002 |400.00| 2003| 500.00|NULL| NULL

实现这一目标的最佳方法是什么？任何帮助将不胜感激。

Answer 1

试试这个：

select
     Person
    ,max(case when coalesce(FDATE,0)=2001 then FDATE else 0 end) as FDATE_1
    ,sum(case when coalesce(FDATE,0)=2001 then Earnings else 0 end) as [1]
    ,max(case when coalesce(FDATE,0)=2002 then FDATE else 0 end) as FDATE_2
    ,sum(case when coalesce(FDATE,0)=2002 then Earnings else 0 end) as [2]
    ,max(case when coalesce(FDATE,0)=2003 then FDATE else 0 end) as FDATE_3
    ,sum(case when coalesce(FDATE,0)=2003 then Earnings else 0 end) as [3]
    ,max(case when coalesce(FDATE,0)=2004 then FDATE else 0 end) as FDATE_4
    ,sum(case when coalesce(FDATE,0)=2004 then Earnings else 0 end) as [4]
from <table>
group by
     Person

请注意，您在SELECT子句中实际要求的列永远不会出现在结果中。

SQL尝试压缩数据

1 个答案: