Sql Server中的Cell to Cell比較？

Question

我有tbl1：

Id | c1 | c2 | c3 | 
    ____|_____|______|_______|_ 
    1  a  b  c 
    ____|_____|______|_______|_ 
    2  h  j  k 
    ____|_____|______|_______|_ 
    3  t  y  u 
    ____|_____|______|_______|_ 

我有tbl2：

Id | c1 | c2 | c3 | 
    ____|_____|______|_______|_ 
    1  a  b  D 
    ____|_____|______|_______|_ 
    2  c  c  c 
    ____|_____|______|_______|_ 
    3  k  l  k 
    ____|_____|______|_______|_ 

我需要每個單元從tbl1在tbl2比較其適當位置：

期望的輸出是：

Id |tbl1 | tbl2 | 
    ____|_____|______| 
    1  a  a  
    ____|_____|______| 
    1  b  b  
    ____|_____|______| 
    1  c  d  
    ____|_____|______| 
    2  h  c  
    ____|_____|______| 
    2  j  c  
    ____|_____|______| 
    2  k  c  
    ____|_____|______| 
      ... 
      ... 
      ... 
      ... 

可視化表示：

我試過很多疑問......但沒有成功......

Answer 1

select T1.id, T1.tbl1, T2.tbl2 
from (
     select U.id, U.tbl1, U.col 
     from tbl1 
     unpivot (tbl1 for col in (c1, c2, c3)) U 
    ) T1 
    inner join 
    (
     select U.id, U.tbl2, U.Col 
     from tbl2 
     unpivot (tbl2 for col in (c1, c2, c3)) U 
    ) T2 
    on T1.id = T2.id and 
     T1.col = T2.col 
order by T1.id 

Answer 2

首先，你應該unpivot的數據：

select Id, C1, 'C1' as C from tbl1 union all 
    select Id, C2, 'C2' as C from tbl1 union all 
    select Id, C3, 'C2' as C from tbl1 union all 

然後你就可以比較數據：

select coalesce(uTbl1.Id,uTbl2.Id) as Id, uTbl1.C, uTbl2.C 
    from (
    select Id, C1 as C, 'C1' as T from tbl1 union all 
    select Id, C2 as C, 'C2' as T from tbl1 union all 
    select Id, C3 as C, 'C3' as T from tbl1) uTbl1 
    full outer join (
    select Id, C1 as C, 'C1' as T from tbl2 union all 
    select Id, C2 as C, 'C2' as T from tbl2 union all 
    select Id, C3 as C, 'C3' as T from tbl2) uTbl2 
     on uTbl1.Id = uTbl2.Id and uTbl1.T = uTbl2.T 

免責聲明： - 未經測試。

編輯隨着CTE：

; with 
    uTbl1 as (
    select Id, C1 as C, 'C1' as T from tbl1 union all 
    select Id, C2 as C, 'C2' as T from tbl1 union all 
    select Id, C3 as C, 'C3' as T from tbl1) 
    ,uTbl2 as (
    select Id, C1 as C, 'C1' as T from tbl2 union all 
    select Id, C2 as C, 'C2' as T from tbl2 union all 
    select Id, C3 as C, 'C3' as T from tbl2) 
    select coalesce(uTbl1.Id,uTbl2.Id) as Id, uTbl1.C, uTbl2.C 
    from 
     uTbl1 
    full outer join 
     uTbl2 
     on uTbl1.Id = uTbl2.Id and uTbl1.T = uTbl2.T 

Answer 3

做3個原子子查詢，然後使用具有UNION ALL得到最終的結果是：

SELECT tbl1.id, tbl1.c1, tbl2.c1 FROM tbl1 
INNER JOIN tbl2 on tbl1.id = tbl2.id 

UNION ALL 

SELECT tbl1.id, tbl1.c2, tbl2.c2 FROM tbl1 
INNER JOIN tbl2 on tbl1.id = tbl2.id 

UNION ALL 

SELECT tbl1.id, tbl1.c3, tbl2.c3 FROM tbl1 
INNER JOIN tbl2 on tbl1.id = tbl2.id 

ORDER BY 1 --sort by column 1 (the IDs)