CODEWITHSUNDEEP
sqlsql-server
Sun Young Lee
Sun Young Lee

Reputation: 51

Concatenating Values into a row

I have data like this

ID   Qusetion_NO  answer
001      1           a
001      2           b
001      4           c
002      1           d
002      2           e
002      3           f
002      4           g

I need to take column B and C turn it into a row. It would ideally end up like :

ID     1    2    3   4
001    a    b        c
002    d    e    f   g

How do I get this table using MS-SQL? Thanks in advance.

Upvotes: 3

Views: 60

Answers (3)

Sean Lange
Sean Lange

Reputation: 33581

You can use conditional aggregation for this.

select ID
    , max(case when Question_NO = 1 then answer end) as [1]
    , max(case when Question_NO = 2 then answer end) as [2]
    , max(case when Question_NO = 3 then answer end) as [3]
    , max(case when Question_NO = 4 then answer end) as [4]
FROM YourTable
group by ID

Upvotes: 3

Yogesh Sharma
Yogesh Sharma

Reputation: 50163

You could also try :

    SELECT ID,
       ISNULL(CONVERT(NVARCHAR(MAX), MAX(CASE
                                             WHEN Qusetion_NO = 1
                                             THEN answer
                                         END)), '') AS [1],
       ISNULL(CONVERT(NVARCHAR(MAX), MAX(CASE
                                             WHEN Qusetion_NO = 2
                                             THEN answer
                                         END)), '') AS [2],
       ISNULL(CONVERT(NVARCHAR(MAX), MAX(CASE
                                             WHEN Qusetion_NO = 3
                                             THEN answer
                                         END)), '') AS [3],
       ISNULL(CONVERT(NVARCHAR(MAX), MAX(CASE
                                             WHEN Qusetion_NO = 4
                                             THEN answer
                                         END)), '') AS [4]
FROM <table_name>
GROUP BY ID;

Desired Output :

ID     1    2    3   4
001    a    b        c
002    d    e    f   g

Upvotes: 0

Serkan Arslan
Serkan Arslan

Reputation: 13393

You can use PIVOT for make it.

DECLARE @T TABLE (ID VARCHAR(3),   Qusetion_NO  INT, answer VARCHAR(3))

INSERT @T
VALUES
('001',1,'a'),
('001',2,'b'),
('001',4,'c'),
('002',1,'d'),
('002',2,'e'),
('002',3,'f'),
('002',4,'g')

SELECT * FROM  
    (SELECT * FROM @T) SRC 
        PIVOT(MAX(answer) 
            FOR Qusetion_NO IN( [1], [2], [3], [4] ) ) PVT

Result:

ID   1    2    3    4
---- ---- ---- ---- ----
001  a    b    NULL c
002  d    e    f    g

Upvotes: 3

Related Questions