Question

我有一个包含2列的表，它只应包含一个值，但有些条目包含2或3个值。对于这些问题行，所有其他列都是相同的。

Table A - Currently 
Deal ID | PA ID | other columns 
1         2       xxxxx
1,2       2       xxxxx
3         1,5     xxxxx

我想要什么

Deal ID | PA ID | other columns 
1         2       xxxxx
1         2       xxxxx
2         2       xxxxx
3         1       xxxxx
3         5       xxxxx

不确定怎么做？我想我需要UNPIVOT，然后删除，。

Answer 1

这是一个解决方案。这是一种蛮力，并使用union all来获得多个副本：

with incols as (
     select (case when charindex(Dealid, ',') > 0
                  then left(DealId, charindex(Dealid, ',') - 1)
                  else DealId
             end) as DealId1,
            (case when charindex(Dealid, ',') > 0
                  then substring(DealId, charindex(DealId, ',') + 1, 100)
             end) as DealId2,
            (case when charindex(PAId, ',') > 0
                  then left(PAId, charindex(PAId, ',') - 1)
                  else PAId
             end) as PAId1,
            (case when charindex(PAId, ',') > 0
                  then substring(PAId, charindex(PAId, ',') + 1, 100)
             end) as PAId2,
            t.*
     from t
    ),
    deals as (
     select (case when whichdeal = 1 then deal1 else deal2 end) as newdeal, t.*
     from ((select *, 1 as whichdeal
            from t
           ) union all
           (select *, 2 as whichdeal
            from t
            where deal2 is not null
           ))  t
    )
select newdeal as dealid, t.*
from deals

包括PA需要添加另一个CTE，然后在dealid和PA id上加入交易和PA以获得所有可能的组合。当两行中都有重复时，你没有准确指出你想要发生什么，所以我只是猜测你想要所有的组合。

Answer 2

解决方案是：

DECLARE @t TABLE ( 
  DealID VARCHAR(10), 
  PAID   VARCHAR(200), 
  [DESC] VARCHAR(100)) 

INSERT @t 
SELECT '1', 
       '2', 
       'xxxx' 
UNION ALL 
SELECT '1,2', 
       '2', 
       'xxxx' 
UNION ALL 
SELECT '3', 
       '1,5', 
       'xxxx' 

SELECT LEFT(b, Charindex(',', b + ',') - 1) AS DealID, 
       LEFT(d, Charindex(',', d + ',') - 1) AS PAID, 
       [Desc] 
FROM   (SELECT Substring(DealID, DE.number, 200) AS b, 
               Substring(PAID, PA.number, 200)   AS d, 
               [Desc] 
        FROM   @t DealID 
               LEFT JOIN (SELECT DISTINCT number 
                          FROM   master.dbo.spt_values 
                          WHERE  number BETWEEN 1 AND 200) PA 
                 ON Substring(',' + PAID, PA.number, 1) = ',' 
               LEFT JOIN (SELECT DISTINCT number 
                          FROM   master.dbo.spt_values S 
                          WHERE  number BETWEEN 1 AND 200) DE 
                 ON Substring(',' + DealID, DE.number, 1) = ',') t

Unpivot或其他东西

2 个答案: