在SQL中排序子查詢

Question

我一直在嘗試在SQL 2012中工作的查詢，我幾乎可以肯定我已經使它復雜化了

我有一個表，其中存儲一個訂單號，商品編號（每個訂單多個），狀態碼（每個商品多個）和時間戳

所以基本上是這樣的

Order Item Status
1     1    1
1     1    2

2     1    1
2     1    2
2     1    3

3     1    3
3     2    1
3     2    2

在我的查詢中（以該表為例），我需要為每個行和每個項目查看以下1個條目，但僅顯示最高可用狀態...但是如果狀態為3，則不會

所以在這種情況下，我想看看

Order Item Status
1     1    2
3     2    2  

我遇到的問題是查詢本身可以工作...但是它返回找到的第一個狀態代碼。 不是最高的。 所以我最終

Order Item Status
1     1    1  
3     2    1

這是完整的擴展代碼段

with summary as (
select a.order_no as order_no, a.item_no as item_no, a.timestamp as timestamp, 
max(a.status_code) as status_code, row_number() over (partition by order_no
order by item_no asc) as rn
from db.ordhist a
where a.order_no > 120400000 and a.order_no < 120800000
and a.timestamp < Dateadd(DD,-3,GETDATE() )
and a.status_code >= 133
and not exists (
select b.order_no, b.item_no
from db.ordhist b
where b.status_code in (137,170,201,999)
and b.order_no = a.order_no
and b.item_no = a.item_no)
and not exists (
select c.order_no
from db.ordhist c
where c.status_code = 6
and c.order_no = a.order_no)
group by a.order_no, a.item_no, a.timestamp)
select * from summary where rn = 1

Answer 1

我認為您不需要ROW_NUMBER只需將GROUP BY與HAVING MAX([Status])<>3 ：

    SELECT  [Order],[Item],MAX([Status])
    FROM Table_Name
    GROUP BY [Order],[Item]
    HAVING MAX([Status])<>3

Answer 2

好的，我想我可能已經回答了我自己的問題...。通過刪除“摘要”中的分組並在最終結果查詢中進行分組

-- Produced (or higher) but not Delivery Noted --
with summary as (
select a.order_no as order_no, a.item_no as item_no, a.timestamp as timestamp, a.status_code as status_code
from db.ordhist a
where a.order_no > 120400000 and a.order_no < 120800000
and a.timestamp < Dateadd(DD,-3,GETDATE() )
and a.status_code >= 133
and not exists (
select b.order_no, b.item_no
from db.ordhist b
where b.status_code in (137,170,201,999)
and b.order_no = a.order_no
and b.item_no = a.item_no)
and not exists (
select c.order_no
from db.ordhist c
where c.status_code = 6
and c.order_no = a.order_no))
select order_no, item_no, timestamp, max(status_code) from summary 
group by order_no, item_no, timestamp
order by status_code