Question

我的实际表格：

--------------------------------------------------
      Col1      |      Col2         |     Col3      |
--------------------------------------------------
     1                A                  1
     6                F                  2
     3                C                  4     
     2                B                  1
     5                E                  3
     4                D                  2

预期结果：

------------------
|Columns Should Be|
------------------
A     B    F    D   C   E

我需要对这个分层逻辑进行SQL查询。我必须使用col 1和col3获得结果逻辑.Kindly帮我解决这个问题。

Answer 1

我刚看了你的回复，我相信这就是你所追求的;

CREATE TABLE #TempData (Col1 int, Col2 varchar(1), Col3 int)
INSERT INTO #TempData (Col1, Col2, Col3)
VALUES
('1','A','1')
,('6','F','4')
,('6','C','2')
,('2','B','1')
,('5','E','3')
,('4','D','5')

SELECT
Col2
FROM #TempData
GROUP BY Col2
ORDER BY SUM(Col1)+SUM(Col3)

DROP TABLE #TempData

Answer 2

declare @table table (col1 int, col2 varchar(1), col3 int)
insert into @table (col1,col3)
values
(1,  1),
(6,  4),
(3,  2),   
(2,  1),
(5,  3),
(4,  2)

/*
      Col1      |      Col2         |     Col3      |
--------------------------------------------------
     1                A                  1
     6                F                  4
     3                C                  2     
     2                B                  1
     5                E                  3
     4                D                  5
*/
select  col1,
        case 
            when col1 > col3 then char(col1 + 64)
            else char(col3 + 64)
        end as col2,
        col3
from    @table

Answer 3

在Sql server中你可以试试这个，

declare @t table (Col1 int, Col2 varchar(1), Col3 int)
INSERT INTO @t (Col1, Col2, Col3)
VALUES
('1','A','1')
,('6','F','2')
,('3','C','4')
,('2','B','1')
,('5','E','3')
,('4','D','2')
declare @str as varchar(100)=''
;with t as(select top 1 col1,col2,col3 from @t union all select t1.col1, t1.col2,t1.col3 from @t t1,t 
where (t1.Col1!=t.Col1 and t1.Col3=t.Col1) )

select @str=@str+'  '+col2 from t
select @str as col

在SQL中查询层次结构顺序

3 个答案: