[英]How to use a new output in where clause in SQL Server
我正在執行此查詢,我想where Age > 120
添加內容,但是由於Age
不是一列,因此無法執行。
你能幫我做到嗎
select
a.NUM_CHASSIS, a.MARQUE, a.MODELE, a.FINITION,
b.CMD_Vente_Incadea, b.Fact_Av_Incadea,
a.DATE_FIN_OF, DATEDIFF(DAY, a.DATE_FIN_OF, GETDATE()) as Age
from
[DashboardPowerBi].[dbo].[BI_SVC_PROD_FIN_OF] as a
join
BI_SVC_INCADEA_STOCK_VN as b on a.NUM_CHASSIS = b.VIN
where
b.CMD_Vente_Incadea = 0
and b.Fact_Av_Incadea = 1
您可以將表達式添加到WHERE
:
SELECT PF.NUM_CHASSIS,
PF.MARQUE,
PF.MODELE,
PF.FINITION,
ISV.CMD_Vente_Incadea,
ISV.Fact_Av_Incadea,
PF.DATE_FIN_OF,
DATEDIFF(DAY, PF.DATE_FIN_OF, GETDATE()) AS Age
FROM [DashboardPowerBi].[dbo].[BI_SVC_PROD_FIN_OF] AS PF
JOIN BI_SVC_INCADEA_STOCK_VN AS ISV ON PF.NUM_CHASSIS = ISV.VIN
WHERE ISV.CMD_Vente_Incadea = 0
AND ISV.Fact_Av_Incadea = 1
AND DATEDIFF(DAY, PF.DATE_FIN_OF, GETDATE()) > 120;
或使用CTE /子查詢:
WITH CTE AS(
SELECT PF.NUM_CHASSIS,
PF.MARQUE,
PF.MODELE,
PF.FINITION,
ISV.CMD_Vente_Incadea,
ISV.Fact_Av_Incadea,
PF.DATE_FIN_OF,
DATEDIFF(DAY, PF.DATE_FIN_OF, GETDATE()) AS Age
FROM [DashboardPowerBi].[dbo].[BI_SVC_PROD_FIN_OF] AS PF
JOIN BI_SVC_INCADEA_STOCK_VN AS ISV ON PF.NUM_CHASSIS = ISV.VIN
WHERE ISV.CMD_Vente_Incadea = 0
AND ISV.Fact_Av_Incadea = 1)
SELECT *
FROM CTE
WHERE CTE.Age > 120;
另外,請注意,我將您的別名更改為更相關的名稱。 使用代表對象名稱的別名非常重要,因為這會使您的代碼更具可讀性。 亞倫·貝特朗(Aaron Bertrand)在以下主題上寫了一篇很棒的文章: 不良習慣:使用(a,b,c)或(t1,t2,t3)之類的表別名 。
在這種情況下cross apply
是一種方便:
select bfo.NUM_CHASSIS, bfo.MARQUE, bfo.MODELE, bfo.FINITION,
s.CMD_Vente_Incadea, s.Fact_Av_Incadea, bfo.DATE_FIN_OF,
v.Age
from [DashboardPowerBi].[dbo].[BI_SVC_PROD_FIN_OF] bfo join
BI_SVC_INCADEA_STOCK_VN s
on bfo.NUM_CHASSIS = s.VIN cross apply
(values (DATEDIFF(DAY, bfo.DATE_FIN_OF, GETDATE())) v(age)
where s.CMD_Vente_Incadea = 0 and s.Fact_Av_Incadea = 1 and
v.age > 120;
注意,我還更改了表別名,因此您的查詢更易於遵循。
select a.NUM_CHASSIS,a.MARQUE,a.MODELE,a.FINITION,b.CMD_Vente_Incadea,b.Fact_Av_Incadea,a.DATE_FIN_OF ,DATEDIFF(DAY, a.DATE_FIN_OF, GETDATE()) as Age from [DashboardPowerBi].[dbo].[BI_SVC_PROD_FIN_OF] as a
join BI_SVC_INCADEA_STOCK_VN as b
on a.NUM_CHASSIS = b.VIN
where b.CMD_Vente_Incadea = 0 and b.Fact_Av_Incadea =1 AND DATEDIFF(DAY, a.DATE_FIN_OF, GETDATE())>120
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