如何在 SQL Server 中索引行号

Question

我有主表和事务表。

1 shipmentheader
2 shimentdetails

我已经加入（内连接）两个表，数据就像

装运头

headerid header
---------------
1        h1
2        h2

订单详情

detailid headerid details      createddate
------------------------------------------
1          1          d1
2          1          d2
3          2          d2

现在当我加入这两个时，我想根据Headerid (shipmentmaster) 生成行号。

加入数据后，排序应在详细信息表createddate 上。我没有低于行号，我想根据HeaderID order by shipping detail table created date 保持增加的数量， 如果存在三个标题 ID，那么它将保持行号 1,2,3 并保持相同的 1,1,2,2 相同，如果加入详细信息表。

RowNumber headerid header details     createddate
-------------------------------------------------
1             1       h1   d1          date
1             2       h1   d3          date
2             2       h2   d2           date

以下是我尝试过的查询，但它们不起作用，也尝试过rank()

select 
    row_number() over (partition by sh.ShipmentHeaderID order by sd.createddate) as 'RowNumber',
    sh.headerid, sh.header, sd.details, sd.createddate 
from 
    ShipmentHeader as sh 
inner join 
    ShipmentDetails as sd on sh.ShipmentHeaderID = sd.ShipmentHeaderID


select 
    dense_rank() over (partition by sh.ShipmentHeaderID order by sd.createddate) as 'RowNumber',
    sh.headerid, sh.header, sd.details, sd.createddate 
from 
    ShipmentHeader as sh 
inner join 
    ShipmentDetails as sd on sh.ShipmentHeaderID = sd.ShipmentHeaderID

为此，我使用 row_number、dense_rank、rank、partition by 加入了以下查询。但我无法得到我想要的结果。

我试图得到这样的输出：

 RowNumber headerid header details     createddate
 ------------------------------------------------------
    1             1       h1   d1          date
    1             2       h1   d3          date
    2             2       h2   d2           date

你能帮我解决这个问题吗？

Answer 1

如果您想按特定顺序查看数据，则需要在查询中使用order by。我认为这可能会满足您的要求：

select dense_rank() over (order by sh.ShipmentHeaderID) as RowNumber,
       sh.headerid, sh.header, sd.details, sd.createddate 
from ShipmentHeader sh inner join 
     ShipmentDetails sd 
     on sh.ShipmentHeaderID = sd.ShipmentHeaderID
order by max(sd.createddate) over (partition by sd.headerid) desc,
         sd.headerid;

我怀疑标题 ID 是按创建顺序排列的。但如果不是，则需要一个子查询：

select dense_rank() over (order by sh.min_createddate, sh.ShipmentHeaderID) as RowNumber,
       sh.headerid, sh.header, sd.details, sd.createddate 
from ShipmentHeader sh inner join 
     (select sd.*,
             min(sd.createddate) over (partition by sd.headerid) as min_createddate
      from ShipmentDetails sd 
     ) sd
     on sh.ShipmentHeaderID = sd.ShipmentHeaderID
order by sd.min_createddate desc, sd.headerid;

我不确定您是否希望增加或减少排序，或者您是否希望最小或最大创建日期，所以这可能需要调整。