Question

伙计我需要将行数据更改为列，我有这样的数据。

AID QID Answer IsTrue
1   11  A1     1
2   11  A2     0
3   11  A3     0
4   11  A4     0

我喜欢这样的输出。

QID AID1 Answer1 IsTrue1 AID2 Answer2 Istrue2 AID3 Answer3 IsTrue3 AID4 Answer4 IsTrue4
11   1   A1      1       2    A2      0       3    A3      0       4    A4      0

我尝试过多个Pivots并加入数据，但是我们不能在Istrue上应用min，max sum，因为它是 BIT 数据类型。我们是否有一些非常简单的方法解决这个问题？

由于

Answer 1

此： -

create table #source (
    aid int,
    qid int,
    answer char(2),
    istrue bit
)
insert into #source values
    (1,11,'a1',1),
    (2,11,'a2',0),
    (3,11,'a3',0),
    (4,11,'a4',0),
    (1,12,'a5',0),
    (2,12,'a6',0),
    (3,12,'a7',1),
    (4,12,'a8',0)

select s.qid,
    q1.aid as aid1, q1.answer as answer1, q1.istrue as istrue1,
    q2.aid as aid2, q2.answer as answer2, q2.istrue as istrue2,
    q3.aid as aid3, q3.answer as answer3, q3.istrue as istrue3,
    q4.aid as aid4, q4.answer as answer4, q4.istrue as istrue4
from (
    select distinct qid
    from #source
) s
join #source q1 on q1.qid=s.qid and q1.aid=1
join #source q2 on q2.qid=s.qid and q2.aid=2
join #source q3 on q3.qid=s.qid and q3.aid=3
join #source q4 on q4.qid=s.qid and q4.aid=4
order by s.qid

生产： -

qid aid1 answer1 istrue1 aid2 answer2 istrue2 aid3 answer3 istrue3 aid4 answer4 istrue4
11  1    a1      1       2    a2      0       3    a3      0       4    a4      0
12  1    a5      0       2    a6      0       3    a7      1       4    a8      0

将多行转换为多列

1 个答案: