在SQL查询滞留

Question

HI

我被困在一个场景中，我有一个像

  testColumn 
      A;B;C;D;E 
      A;B 
      C;D 

我想作为单独的列输出（我的列数像下面的例子有一个列始终5列）

  A B C D E 
     x x x x x 
     x x 
      X X 

Answer 1

构建一个存储过程，

这可能是一个良好的开端ING点： http://www.codeproject.com/KB/database/SQLArrayParameterHandling.aspx

问候， //牛逼

Answer 2

WITH T(C) AS 
(
SELECT 'A;B;C;D;E' UNION ALL 
SELECT 'A;B' UNION ALL 
SELECT 'C;D' 
) 
SELECT 
     CASE WHEN CHARINDEX('A',C) > 0 THEN 'X' ELSE '' END AS 'A', 
     CASE WHEN CHARINDEX('B',C) > 0 THEN 'X' ELSE '' END AS 'B', 
     CASE WHEN CHARINDEX('C',C) > 0 THEN 'X' ELSE '' END AS 'C', 
     CASE WHEN CHARINDEX('D',C) > 0 THEN 'X' ELSE '' END AS 'D', 
     CASE WHEN CHARINDEX('E',C) > 0 THEN 'X' ELSE '' END AS 'E' 
FROM T 

使你想要的结果

A B C D E 
---- ---- ---- ---- ---- 
X X X X X 
X X    
      X X  

Answer 3

;with TestTable(testColumn) as 
(
    select 'A;B;C;D;E' union all 
    select 'A;B' union all 
    select 'C;D' 
) 

select 
    case when n.r.exist('r[.="A"]') = 1 then 'X' else '' end as A, 
    case when n.r.exist('r[.="B"]') = 1 then 'X' else '' end as B, 
    case when n.r.exist('r[.="C"]') = 1 then 'X' else '' end as C, 
    case when n.r.exist('r[.="D"]') = 1 then 'X' else '' end as D, 
    case when n.r.exist('r[.="E"]') = 1 then 'X' else '' end as E 
from TestTable 
    cross apply (select cast('<r>'+replace(testColumn, ';', '</r><r>')+'</r>' as xml)) n(r) 

结果

A B C D E 
---- ---- ---- ---- ---- 
X X X X X 
X X    
      X X