SQLユニオンクエリの問題

Question

以下のコードで何が問題になっていますか？両方のselect文の間で結合する必要があります。私はそれがこの

のようになりたい

select 
    tt.SlpName, tt.Sum, tt.Duedate 
from 
    (select 
     t3.docnum as 'Invoice', null as 'Receipt', 
     isnull(t6.SlpName, t6.SlpName) 'slpname', 
     null as 'Sum', null as 'Duedate' 
    from 
     oitr t0 
    inner join 
     ITR1 t1 on t0.ReconNum = t1.ReconNum 
    inner join 
     ojdt t2 on t1.transid = t2.transid 
    inner join 
     oinv t3 on t3.docnum = t2.BaseRef and t1.IsCredit = 'D' 
    inner join 
     oslp t6 on t3.slpcode = t6.SlpCode 
    where 
     t1.ReconNum = '819272' 

    union all 

    select 
     t4.docnum as 'Receipt', null as 'Invoice', 
     'slpname', t5.checksum 'Sum', t5.DueDate 'Duedate' 
    from 
     oitr t0 
    inner join 
     ITR1 t1 on t0.ReconNum = t1.ReconNum 
    inner join 
     ojdt t2 on t1.transid = t2.transid 
    inner join 
     orct t4 on t4.docnum = t2.BaseRef and t1.IsCredit = 'C' 
    inner join 
     rct1 t5 on t5.docnum = t4.DocNum 
    where 
     t1.ReconNum = '819272') tt 

は

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Answer 1

がisnull(t6.SlpName,t6.SlpName) であなたの下のクエリで'slpname'を交換し、追加をありがとうinner JOIN oslp t6 on t3.slpcode = t6.SlpCode