根据其值将SQL列拆分为2

Question

我有以下查询：

commands

哪个输出：

我想在subprocess列中使用仅有的两个可能的值，并将它们作为自己的列。下表是我拍摄的内容。

Answer 1

您可以通过使用不同的别名连接表来根据其值拆分列。

假设您的表销售字段为shopId，dept，sales

你可以这样做：

select 
    s1.shopId, 
    s1.dept, s1.sales grocery_sales, 
    s2.dept, s2.sales bakery_sales
from 
    Sales s1, Sales s2
where 
    s1.shopId = s2.shopId
and s1.dept="grocery" 
and s2.dept="bakery"

Answer 2

declare  @PharmTransDateKey int
set @PharmTransDateKey = 20160630

SELECT
    ds.StoreName
    ,SUM(CASE WHEN dro.NetCount < 0 THEN ClaimAmount ELSE 0 END) AS 'Previous Period Adj'
    ,SUM(CASE WHEN dro.NetCount < 0 THEN 0 ELSE ClaimAmount END) AS 'Todays Sales'
FROM
    Final.FactRxBusinessEffectiveDay f 
    inner join Final.DimRxOutcome dro 
        on  f.RxOutcomeKey = dro.RxOutcomeKey
    inner join Final.DimStore ds
        on  ds.StoreKey = f.StoreKey and
            ds.SourceChainKey = 254 
WHERE
    PharmTransDateKey =  @PharmTransDateKey and
    dro.NetCount <> 0
GROUP BY
    ds.StoreName

我会写PIVOT，但实际上你会转动一个你可以修改的查询和SUM CASE STATEMENTS，并且更简单，更快地得到你的答案。您正在显示的结果与最终所需结果之间无需中介查询。

Answer 3

调整查询以计算字段，如下所示：

select 
    ds.StoreName, 
    sum(case when dro.NetCount < 0 then claimamount end) 'Previous Period Adj'
    sum(case when dro.NetCount >= 0 then claimamount end) 'Todays Sales'
from
    Final.FactRxBusinessEffectiveDay f 
        inner join Final.DimRxOutcome dro 
            on  f.RxOutcomeKey = dro.RxOutcomeKey
        inner join Final.DimStore ds
            on  ds.StoreKey = f.StoreKey and
                ds.SourceChainKey = 254 
where  
    PharmTransDateKey =  @PharmTransDateKey and
    dro.NetCount <> 0
group by 
    ds.StoreName,
order by 1