Question

我想编写一个视图脚本。 Catch是我需要使用原始表的一列中的值，并在我的视图中将它们显示在多个列中。有没有人有我可以遵循的示例脚本？例如，我有一个包含20个不同功能的列的表。我需要在视图中有20个不同的列，仅用于功能部分。功能列将包含“皮革座椅”“1/2浴室”

等数据

再次感谢

Answer 1

由于您没有提供DDL或DML，而且我没有时间为您做这件事，我会给您一个通用的＆＃39;＆＃39;溶液

declare @survey table (Respondent int identity(1,1), Q1 int, Q2 int, Q3 int, Q4 int, Q5 int)
declare @questions table (PK_quID int identity(1,1), quName varchar(255))
declare @answers table (PK_anID int identity(1,1), anName varchar(255))

insert into @questions values ('Do you have a drivers license?')
insert into @questions values ('What best describes your current employment conditions?')
insert into @questions values ('Do you have hair?')
insert into @questions values ('What kind of vehicle do you drive?')
insert into @questions values ('What state are you from?')
insert into @answers values ('yes')
insert into @answers values ('no')
insert into @answers values ('working')
insert into @answers values ('not working')
insert into @answers values ('car')
insert into @answers values ('truck')
insert into @answers values ('suv')
insert into @answers values ('MO')
insert into @answers values ('IL')
insert into @answers values ('TN')
insert into @survey values (1,3,1,5,8)
insert into @survey values (2,4,1,6,8)
insert into @survey values (1,4,1,7,9)
insert into @survey values (2,3,2,6,9)
insert into @survey values (1,3,1,5,10)



select
    s.*,
    qu.*,
    an.*
from
(
    select 
        Respondent,
        right(Q,1) as Q, 
        A 
    from @survey
    unpivot
    (
        A for Q in (Q1, Q2, Q3, Q4, Q5)
    ) as u
) s
    left outer join @questions qu
        on s.Q=qu.PK_quID
    left outer join @answers an
        on s.a = an.PK_anID

也...

declare @responses table (Respondent int, FK_quID int, FK_anID int)

insert into @responses
(
    Respondent,
    FK_quID,
    FK_anID
)
select 
    Respondent,
    right(Q,1) as Q, 
    A 
from @survey
unpivot
(
    A for Q in (Q1, Q2, Q3, Q4, Q5)
) as u

...最后

select
*
from
(
    select
        Respondent,
        quName,
        anName
    from @responses r
        inner join @questions q
            on r.FK_quID=q.PK_quID
        inner join @answers a
            on r.FK_anID=a.PK_anID
) a
pivot
(
    count(a.Respondent)
    for anName in 
        (
            [yes],
            [no],
            [working],
            [not working],
            [car],
            [truck],
            [suv],
            [MO],
            [IL],
            [TN]
        )
) as pvt

有关详情，请参阅以下链接。

http://blogs.lessthandot.com/index.php/datamgmt/dbprogramming/how-to-unpivot-and-pivot/

http://blogs.lessthandot.com/index.php/datamgmt/datadesign/understanding-sql-server-2000-pivot/

T-sql查看一列到多列

1 个答案: