Question

我有以下sql查询：

 select         
I.N.value('@DRN', 'varchar(50)') as DRN,
I.N.value('@CR_GUID', 'varchar(50)') AS CR,
I.N.value('@DR_GUID', 'varchar(50)') AS DR,
I.N.value('@AMOUNT', 'money') as Amount,
I.N.value('@DATE', 'Date') as ProDate
from Table as T
cross apply T.column.nodes('/ITEMS/ITEM') as I(N)

目前它将带回一切，例如：

DRN    CR         DR        Amount        Prodate
12     2p1rf      684pb     4686.23       2012-11-14
12     586io      fdc25     4686.23       2012-11-16
13     hnv7p      19i6f     1800.00       2012-11-20
14     cd7k0      9s2vc      570.50       2012-11-20
15     pm78s      qw3d5     8500.00       2012-11-23

如何从结果中排除以下内容，这是来自xml列中的同一行？

 DRN    CR         DR        Amount        Prodate
*12*     2p1rf      684pb     4686.23       2012-11-14
*12*     586io      fdc25     4686.23       2012-11-16

我只希望查询带回xml列中一个项目的行而不是多个值。

谢谢

然后我如何只带回多个项目的第一个项目：

 DRN    CR         DR        Amount        Prodate
*12*     2p1rf      684pb     4686.23       2012-11-14
*12*     586io      fdc25     4686.23       2012-11-16

所以我想只看到日期为2012-11-14的项目，而不是与该行有关的所有内容？我希望这有道理吗？

Answer 1

你应该可以在那个

上进行内联聚合和过滤

SELECT
    X.DRN, X.CR, X.DR, X.Amount, X.ProDate
FROM
    (
    SELECT
        COUNT(*) OVER (PARTITION BY I.N.value('@DRN', 'varchar(50)')) AS CountPerDRN,
        I.N.value('@DRN', 'varchar(50)') as DRN,
        I.N.value('@CR_GUID', 'varchar(50)') AS CR,
        I.N.value('@DR_GUID', 'varchar(50)') AS DR,
        I.N.value('@AMOUNT', 'money') as Amount,
        I.N.value('@DATE', 'Date') as ProDate
    from
        MyTable as T
        cross apply
        T.Mycolumn.nodes('/ITEMS/ITEM') as I(N)
    ) X
WHERE
   X.CountPerDRN= 1

在添加问题后编辑

只需将内联聚合更改为窗口函数
在这种情况下，我选择了基于最低ProDate

的行

SELECT
    X.DRN, X.CR, X.DR, X.Amount, X.ProDate
FROM
    (
    SELECT
        ROW_NUMBER() OVER (
                  PARTITION BY I.N.value('@DRN', 'varchar(50)')
                  ORDER BY I.N.value('@DATE', 'Date')
                  ) AS rnPerDRN,
        I.N.value('@DRN', 'varchar(50)') as DRN,
        I.N.value('@CR_GUID', 'varchar(50)') AS CR,
        I.N.value('@DR_GUID', 'varchar(50)') AS DR,
        I.N.value('@AMOUNT', 'money') as Amount,
        I.N.value('@DATE', 'Date') as ProDate
    from
        MyTable as T
        cross apply
        T.Mycolumn.nodes('/ITEMS/ITEM') as I(N)
    ) X
WHERE
   X.rnPerDRN = 1

从XML列中提取某些值

1 个答案: