doppelte Spalte, wenn eine Tabelle zweimal verbinden

Question

wenn ich eine Tabelle zwei Mal für verschiedene Daten aus Tabelle zwei, wenn Tabelle zwei verschiedene Zeilenanzahl Daten einige Spalte doppelt sein.

select 
o.order_no 
,sr.reason as reason1 
,datediff(minute,s.begin_stop,s.end_stop) as s1 
,sr2.reason as reason2 
,datediff(MINUTE,s2.begin_stop,s2.end_stop) as s2 
from [order] o 
left join [stops] s on s.order_id=o.id and s.section='print' 
join [stopreason] sr on s.error_code=sr.code 
left join [stops] s2 on s2.order_id=o.id and s2.section='laminate1' 
join [stopreason] sr2 on sr2.code=s2.error_code 
where datepart(ww,o.date_onexit)=39 
order by order_no 

und ich dieses resoult

Answer 1

Try this one:

;WITH part1 AS (
    select o.order_no, 
      sr.reason as reason1, 
      datediff(minute,s.begin_stop,s.end_stop) as s1, 
      ROW_NUMBER() OVER (PARTITION BY o.order_no ORDER BY o.order_no) rn 
    from [order] o 
    left join [stops] s 
     on s.order_id=o.id and s.section='print' 
    join [stopreason] sr 
     on s.error_code=sr.code 
    where datepart(ww,o.date_onexit)=39 
), part2 AS (
    select o.order_no, 
      sr2.reason as reason2, 
      datediff(MINUTE,s2.begin_stop,s2.end_stop) as s2, 
      ROW_NUMBER() OVER (PARTITION BY o.order_no ORDER BY o.order_no) as rn 
    from [order] o 
    left join [stops] s2 
     on s2.order_id=o.id and s2.section='laminate1' 
    join [stopreason] sr2 
     on sr2.code=s2.error_code 
    where datepart(ww,o.date_onexit)=39 
) 

SELECT p1.order_no, 
     p1.reason1, 
     p1.s1, 
     p2.reason2, 
     p2.s2 
FROM part1 p1 
LEFT JOIN part2 p2 
    ON p1.order_no = p2.order_no AND p1.rn = p2.RN 
order by p1.order_no 

erste CTE (part1) sammelt Daten für section='print', zweite - für section='laminate1'. Und wir fügen ROW_NUMBER() hinzu. Dann treten Sie zwei CTEs bei.

Eine weitere Möglichkeit:

;WITH part1 AS (
    select o.order_no, 
      sr.reason as reason, 
      datediff(minute,s.begin_stop,s.end_stop) as s, 
      s.section, 
      ROW_NUMBER() OVER (PARTITION BY o.order_no,s.section ORDER BY o.order_no) rn 
    from [order] o 
    left join [stops] s 
     on s.order_id=o.id and (s.section='print' or s.section='laminate1') 
    join [stopreason] sr 
     on s.error_code=sr.code 
    where datepart(ww,o.date_onexit)=39 
) 

SELECT p1.order_no, 
     p1.reason1, 
     p1.s1, 
     p2.reason2, 
     p2.s2 
FROM part1 p1 
LEFT JOIN part1 p2 
    ON p1.order_no = p2.order_no AND p1.rn = p2.RN AND p2.section='laminate1' 
WHERE p1.section='print' 
order by p1.order_no