Question

我在查询中停留了几天，无法通过简单的查询对数据进行排序。

由于我的数据有点复杂，我以数据为例。

以下是数据表（原始数据）的摘录：

Products --- Qty --- Info
Chair --- 1 --- Sold
Lamp --- 1 --- Sold
Chair --- 3 --- Sold
Chair --- 1 --- Sold
Chair --- 2 --- Sold
Table --- 4 --- Sold
Computer --- 2 --- Sold
Chair --- 1 --- Returned
Table --- 1 --- Sold
Desk --- 3 --- Sold
Chair --- 2 --- Returned
Etc. (a lot of lines)

这是我求和的结果（仅是数量QTY，取决于它是否已售出或是否在两个不同的列中返回）-ORDER BY：QtySold，然后是{{1} }，然后QtyRet

Prod

我想对它们进行排序：在此示例中，我想按Prod --- QtySold --- QtyRet --- Info Chairs --- 95 ------ / ------ Sold Tables --- 33 ------ / ------ Sold Book --- 22 ------ / ------ Sold Computer --- 22 ------ / ------ Sold Lamp --- 19 ------ / ------ Sold Desk --- 11 ------ / ------ Sold Chairs --- / ------ 5 ------ Returned Computer --- / ------ 2 ------ Returned Tables --- / ------ 2 ------ Returned进行排序，但是如果QtySold出现两次，我希望第二个出现在第一个下面（例如椅子- 95-/-已售出，然后是椅子-/-5-返回，等等）

这是代码（它可能包含错误，因为我在这里直接写了它）：

Prod

我想要获得的结果是：

SELECT
Prod=ttt.Prod,
QtySold=ttt.QtySold=CONVERT(Decimal(5,1),SUM(ISNULL(ttt.QtySold,0))),
QtyRet=CONVERT(Decimal(5,1),SUM(ISNULL(ttt.QtyRet,0))),
Info=ttt.Info

FROM(

SELECT    
Prod=nte.Products,
QtySold=(CASE WHEN (ISNULL(nte.Info,'0')='Sold') THEN ISNULL(nte.Qty,0) ELSE 0 END),
QtyRet=(CASE WHEN (ISNULL(nte.Info,'0')='Sold') THEN 0 ELSE ISNULL(nte.Qty,0) END),
Info=nte.Info

FROM
nametableexemple nte

)ttt
GROUP BY ttt.Prod, ttt.Info
ORDER BY ttt.QtySold DESC, ttt.QtyRet DESC, ttt.Prod -- Here is the issue

（按DESC顺序订购Prod --- QtySold --- QtyRet --- Info Chairs --- 95 ------ / ------ Sold Chairs --- / ------ 5 ------ Returned --(because Chair is first with 95 Sold) Tables --- 33 ------ / ------ Sold Tables --- / ------ 2 ------ Returned --(because Table is 2nd with 33 Sold) Book --- 22 ------ / ------ Sold Computer --- 22 ------ / ------ Sold Computer --- / ------ 2 ------ Returned --(because Computer is 4th w 22Sold) Lamp --- 19 ------ / ------ Sold Desk --- 11 ------ / ------ Sold：95-33-22-22-19-19）（但是第一项（主席）也是“返回的”信息，因此我需要使其直接显示在其下方）

是否可以以其他方式执行“排序依据”？我想避免创建UNION ALL，因为我的表包含太多列。

Answer 1

尝试以下CTE-

WITH CTE
AS
(
    SELECT Products,SUM(qty) Q,Info
    FROM your_table
    GROUP BY Products,Info
)

SELECT A.*
FROM CTE2 A
ORDER BY 
(SELECT Q FROM CTE2 B WHERE B.Info = 'Sold' AND B.Products = A.Products)  DESC,
1, 
CASE WHEN info = 'Sold' THEN 1 ELSE 2 END

Answer 2

创建CTE并将查询（不包含ORDER BY子句）括起来，然后进行条件排序：

with cte as (
  <your query here>
)
select * from cte c
order by 
  case 
    when coalesce(c.QtySold, 0) <> 0 then c.QtySold
    else (select QtySold from cte where prod = c.prod and coalesce(QtySold, 0) <> 0) 
  end desc,
  QtySold DESC, prod

仅当coalesce()产品行中的QtySold为null时，才需要功能'Returned'。
如果是0，请使用以下命令：

order by 
  case 
    when c.QtySold <> 0 then c.QtySold
    else (select QtySold from cte where prod = c.prod and QtySold <> 0) 
  end desc,
  QtySold DESC, prod

按度量排序，但将相关行保持在一起

2 个答案: