Question

I have a table Student, now I would like to query the result the same as the second table. One group must have 2 students.

Student ID    Name    Gender    Group
1             A       M         A1
2             B       F         A1
3             C       M         A2
4             D       M         A2
5             E       F         A3
6             F       F         A3     

Name1    Gender1    Name2    Gender2    Group
A        M          B        F          A1
C        M          D        M          A2
E        F          F        F          A3

Answer 1

Here is the complete example.

CREATE TABLE testing
(id char(10),
name char(10),
gender char(1),
grp char(10))

insert into testing values ('1','A','M','A1')
insert into testing values ('2','B','F','A1')
insert into testing values ('3','C','M','A2')
insert into testing values ('4','D','M','A2')
insert into testing values ('5','E','F','A3')
insert into testing values ('6','F','F','A3')


    select name1, gender1, name2, gender2, a.grp  from
    (
    SELECT name1 = CASE CONVERT(int,id)%2 WHEN 1 THEN name ELSE null END,
            gender1 = CASE CONVERT(int,id)%2 WHEN 1 THEN gender ELSE null END,
            grp FROM testing where CONVERT(int,id)%2 =1
    ) a 
    left join 
    (
    SELECT name2 = CASE CONVERT(int,id)%2 WHEN 0 THEN name ELSE null END,
            gender2 = CASE CONVERT(int,id)%2 WHEN 0 THEN gender ELSE null END,
            grp FROM testing where CONVERT(int,id)%2 =0
    ) b on a.grp=b.grp