Question

如何订购一些数据，基于StockID为3，并且在这种情况下还有两个仓库：WarehouseId 1和13，

from dateutil.parser import parse
parse("2015-10-1 3:00 PM GMT+1:00")

结果：

select ProductID, WarehouseID, StockID
from @allStocksState 
group by ProductID, WarehouseID, StockID
order by CASE WHEN StockID = 3 then 0
             else 1 
         end

所以在6995,7020,7031的情况下应该出现在最后，因为在这种情况下他们每个只有一个WarehouseId，所以我需要应用什么更改我的查询？任何帮助将不胜感激。

Answer 1

您可以在order by：

中使用窗口函数

select ProductID, WarehouseID, StockID
from @allStocksState 
group by ProductID, WarehouseID, StockID
order by count(*) over (partition by productid) desc,
         (case when StockID = 3 then 0 else 1 end);

count(*) over (partition by productid)计算有多少行具有相同的productid。

Answer 2

select ProductID,WarehouseID,StockID from @allStocksState 
    group by ProductID,WarehouseID,StockID
    order by CASE WHEN StockID=3 then
    "ASC" else
    "DESC" end

用于按组排序的SQL条件

2 个答案: