[英]How to use a new output in where clause in SQL Server
I'm executing this query and I want to add where Age > 120
, but since Age
is not a column, I couldn't do it. 我正在执行此查询,我想
where Age > 120
添加内容,但是由于Age
不是一列,因此无法执行。
Can you help me to do that 你能帮我做到吗
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
You could add the expression to your WHERE
: 您可以将表达式添加到
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;
Or use a CTE/Subquery: 或使用CTE /子查询:
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;
Also, note I changed your aliases to something more relevant. 另外,请注意,我将您的别名更改为更相关的名称。 Using aliases that represent the object's name is really important as it makes your code much more readable.
使用代表对象名称的别名非常重要,因为这会使您的代码更具可读性。 Aaron Bertrand did a great article on the subject: Bad habits to kick : using table aliases like (a, b, c) or (t1, t2, t3) .
亚伦·贝特朗(Aaron Bertrand)在以下主题上写了一篇很棒的文章: 不良习惯:使用(a,b,c)或(t1,t2,t3)之类的表别名 。
cross apply
is a convenience in this circumstance: 在这种情况下
cross apply
是一种方便:
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;
Notice that I also changed the table aliases so your query is easier to follow. 注意,我还更改了表别名,因此您的查询更易于遵循。
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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