SQL查詢，我已經加入了相同的表，但在不同的行中有相同的值

Question

在同一張表下，我必須找到不同字段的總和，因此我正在使用以下查詢

select db.*, isnull(cb."8",0) as "8", db."PUR Total" - isnull(cb."8",0) as "9", eb.Item1, eb."PO Total"
  from 
  (select b.t_dicl as Department, c.t_item as Item, sum( c.t_qstk )as "8"
  from inforlndb.dbo.twhinr1109980 AS c INNER JOIN inforlndb.dbo.ttcemm1129980 AS b ON  b.t_waid = c.t_cwar
  where c.t_koor = 2 and c.t_kost = 3 and month(c.t_trdt) <= @aMonth - 1
  group by c.t_item, b.t_dicl) as cb
full outer join
    (select b.t_dicl as Department, c.t_item as Item, sum( c.t_qstk )as "PUR Total"
    from inforlndb.dbo.twhinr1109980 AS c INNER JOIN     inforlndb.dbo.ttcemm1129980 AS b ON  b.t_waid = c.t_cwar
    where c.t_koor = 2 and c.t_kost = 3 and month(c.t_trdt) <= @aMonth
    group by c.t_item, b.t_dicl) as db
    on cb.Item = db.Item
--Production order
full outer join
    (select b.t_dicl as Department, c.t_item as Item, sum( c.t_qstk )as "8"
  from inforlndb.dbo.twhinr1109980 AS c INNER JOIN inforlndb.dbo.ttcemm1129980 AS b ON  b.t_waid = c.t_cwar
  where c.t_koor = 1 and c.t_kost = 5 and month(c.t_trdt) <= @aMonth - 1
  group by c.t_item, b.t_dicl) as ab
  on cb.Item = ab.Item
full outer join
(select b.t_dicl as Department, c.t_item as Item1, sum( c.t_qstk )as "PO Total"
    from inforlndb.dbo.twhinr1109980 AS c INNER JOIN inforlndb.dbo.ttcemm1129980 AS b ON  b.t_waid = c.t_cwar
     where c.t_koor = 1 and c.t_kost = 5 and month(c.t_trdt) <= @aMonth
    group by c.t_item, b.t_dicl) as eb
    on cb.Item = eb.Item1

樣本輸出是

Department  Item    PUR Total   8   9       Item1       PO Total
EV           G00046301  25000   0   25000   NULL        NULL
EV           G00053001  10000   10000   0   G00053001   55
EV           G00251701  4500    4500    0   G00251701   220
TF           G01259901  200 0   200 NULL    NULL
NULL        NULL        NULL    0   NULL    NG707460AS  5
NULL        NULL        NULL    0   NULL    G00046301   72
NULL        NULL        NULL    0   NULL    G02280100   6
NULL        NULL        NULL    0   NULL    NG707460BS  5

從輸出中，您可以看到在Item和Item1列下的不同行中有兩個相同的數據。 如何合並它們？

對不起，代碼很亂，我仍在學習過程中==

Answer 1

中間的兩個部分將Item連接到Item，而不是Item連接到Item1。 Item1到Item1僅在最終聯接中發生。 在您的頂部選擇列表中，我們有db.Item（來自第二個表）和eb.Item1（來自最后一個表）。 查看項目G00046301我們看到它存在於db表中，但是要在eb表中找到它的匹配項，我們需要：

db.Item -> ab.Item -> eb.Item1

中間表（ab）不能有G00046301的行。 因為這些是完全外部聯接，所以當缺少中間鏈接但末尾的表找不到它們時，我們仍然會得到結果。 所以...

由於您的選擇似乎更關注db和ab，因此您可以嘗試像這樣直接加入它們：

select db.*, isnull(cb."8",0) as "8", db."PUR Total" - isnull(cb."8",0) as "9", eb.Item1, eb."PO Total"
  from 
  (select b.t_dicl as Department, c.t_item as Item, sum( c.t_qstk )as "8"
  from inforlndb.dbo.twhinr1109980 AS c INNER JOIN inforlndb.dbo.ttcemm1129980 AS b ON  b.t_waid = c.t_cwar
  where c.t_koor = 2 and c.t_kost = 3 and month(c.t_trdt) <= @aMonth - 1
  group by c.t_item, b.t_dicl) as cb
full outer join
    (select b.t_dicl as Department, c.t_item as Item, sum( c.t_qstk )as "Total"
    from inforlndb.dbo.twhinr1109980 AS c INNER JOIN     inforlndb.dbo.ttcemm1129980 AS b ON  b.t_waid = c.t_cwar
    where c.t_koor = 2 and c.t_kost = 3 and month(c.t_trdt) <= @aMonth
    group by c.t_item, b.t_dicl) as db
    on cb.Item = db.Item
--Production order
full outer join
    (select b.t_dicl as Department, c.t_item as Item, sum( c.t_qstk )as "8"
  from inforlndb.dbo.twhinr1109980 AS c INNER JOIN inforlndb.dbo.ttcemm1129980 AS b ON  b.t_waid = c.t_cwar
  where c.t_koor = 1 and c.t_kost = 5 and month(c.t_trdt) <= @aMonth - 1
  group by c.t_item, b.t_dicl) as ab
  on cb.Item = ab.Item
full outer join
(select b.t_dicl as Department, c.t_item as Item1, sum( c.t_qstk )as "Total"
    from inforlndb.dbo.twhinr1109980 AS c INNER JOIN inforlndb.dbo.ttcemm1129980 AS b ON  b.t_waid = c.t_cwar
     where c.t_koor = 1 and c.t_kost = 5 and month(c.t_trdt) <= @aMonth
    group by c.t_item, b.t_dicl) as eb
    on db.Item = eb.Item1

唯一的變化是最后一行

    on db.Item = eb.Item1

我希望這有幫助。