Question

我有下表（最多可以有15条评论行）

DeliveryNo|LineNo |CommentNo |CommentText
--------  |-------|----------|------------
2214518   |1      |1         |pre SS17 order                                              
2214518   |1      |2         |CHECK DELIVERY DATE
2214518   |1      |3         |02/11/2016
2214518   |1      |4         |For Attention
2214518   |1      |5         |Joe Soaps

需要输出看起来像这样

DeliveryNo| LineNo|Comment1           |Comment2
----------|-------|-------------------|------------
2214518   |1      |pre SS17 order     |CHECK DELIVERY DATE
2214518   |1      |02/11/2016         |For Attention
2214518   |1      |Joe Soaps          |

Answer 1

您可以对CASE EXPRESSION使用条件聚合：

SELECT t.deliveryNo,
       t.lineNo,
       MAX(CASE WHEN t.CommentNo % 2 = 1 THEN t.commentText END) as comment1,
       MAX(CASE WHEN t.CommentNo % 2 = 0 THEN t.commentText END) as comment2
FROM YourTable t
GROUP BY t.deliveryNo,
         t.lineNo,
         CEIL(t.CommentNo / 2)

Answer 2

我就是这样做的......

if object_id('tempdb..#Test') is not null drop table #Test

create table #Test (DeliveryNo bigint, Line int, CommentNo int, CommentText nvarchar(100))

insert into #Test(DeliveryNo, Line, CommentNo, CommentText)
values
(2214518   ,1      ,1         ,'pre SS17 order'),
(2214518   ,1      ,2         ,'CHECK DELIVERY DATE'),
(2214518   ,1      ,3         ,'02/11/2016'),
(2214518   ,1      ,4         ,'For Attention'),
(2214518   ,1      ,5         ,'Joe Soaps')

select t1.DeliveryNo, 
   t1.Line,
   t1.CommentText,
   t2.CommentText
from #Test t1
left join #Test t2 on t1.CommentNo = t2.CommentNo - 1
where t1.CommentNo % 2 = 1

结果就像你要求的那样

Answer 3

select 
    DeliveryNo,
    LineNo,
    A.CommentText as Comment1,
    B.CommentText as Comment2
    from table as A left join table as B
    on A.DeliveryNo=B.DeliveryNo and A.CommentNo=B.CommentNo-1
where (A.CommentNo mod 2) > 1

SQL - 一行将蛇分成两列

3 个答案: