[英]joining multiple common table expressions
我有两个Query,Query1:
with cte as (
select
dbo.Cable.*,
row_number() over(partition by dbo.Cable.TagNo order by dbo.Cable.CableRevision desc) as rn
from dbo.Cable
where (dbo.Cable.CableRevision = @CoreRevision )
)
select *
from cte
where rn = 1
还有Query2
with cte as (
select
dbo.Cable.TagNo,dbo.Core.*,
row_number() over(partition by dbo.Core.CoreNo order by dbo.Core.CoreRevision desc) as rn
from dbo.Core INNER JOIN
dbo.Cable ON dbo.Cable.Id = dbo.Core.CableId
where (dbo.Core.CoreRevision <= @CoreRevision )
)
select *
from cte
where rn = 1
这两个查询是由Query1.TagNo
和Query2.TagNo
相关的, Query2.TagNo
怎样才能使用加入这两个查询,是否可以使用With
Command做到这一点?
谢谢
尝试这个查询,也许这就是你要找的东西。
;WITH cte AS
(SELECT dbo.Cable.*,
row_number() over(partition by dbo.Cable.TagNo order by dbo.Cable.CableRevision desc) as rn
FROM dbo.Cable
WHERE dbo.Cable.CableRevision = @CoreRevision
), cte2 AS
(SELECT dbo.Cable.TagNo, dbo.Core.*,
row_number() over(partition by dbo.Core.CoreNo order by dbo.Core.CoreRevision desc) as rn
FROM dbo.Core INNER JOIN dbo.Cable ON dbo.Cable.Id = dbo.Core.CableId
WHERE dbo.Core.CoreRevision <= @CoreRevision
)
SELECT *
FROM cte c FULL JOIN cte2 c2 ON c.TagNo = c2.TagNo
WHERE c.rn = 1 OR c2.rn = 1
with cte as
(
select
dbo.Cable.*,
row_number() over(partition by dbo.Cable.TagNo order by dbo.Cable.CableRevision desc) as rn
from dbo.Cable
where (dbo.Cable.CableRevision = @CoreRevision )
),
cte2 as (
select
dbo.Cable.TagNo,dbo.Core.*,
row_number() over(partition by dbo.Core.CoreNo order by dbo.Core.CoreRevision desc) as rn
from dbo.Core INNER JOIN
dbo.Cable ON dbo.Cable.Id = dbo.Core.CableId
where (dbo.Core.CoreRevision <= @CoreRevision )
)
select *
from cte
join cte2 on cte1.TagNo = cte2.TagNo
where cte.rn = 1 and cte2.rn = 1;
我不知道条件cte.rn = 1 and cte2.rn = 1
是否是你想要的。 也许你只想在其中一个CTE上,也许在两者上,也许你真的想要在连接条件下使用cte2.rn = 1
的外连接...
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