joindre plusieurs expressions de table communes

Question

J'ai deux requêtes, 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

et aussi 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

ces deux requêtes sont liées par Query1.TagNo et Query2.TagNo comment puis-je utiliser pour joindre ces deux requêtes, est-il possible de le faire avec la commande With?

Je vous remercie

Answer 1

Essayez cette requête, c'est peut-être ce que vous recherchez.

;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

Answer 2

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;

Je ne sais pas si la condition cte.rn = 1 and cte2.rn = 1 c'est ce que vous voulez. Peut-être que vous le voulez juste sur l'un des CTE, peut-être sur les deux, peut-être voulez-vous réellement une jointure externe avec cte2.rn = 1 dans la condition de jointure ...