what is the difference between group and having
give an example with query and sample output
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Answer Posted / krishna murari chaubey
You Have two table person and friend
create table person(id int,pname varchar(20),gender varchar(3))
insert into person(id,pname,Gender)values(1,'krishna','m')
insert into person(id,pname,Gender)values(2,'Radha','m')
insert into person(id,pname,Gender)values(3,'Anamika','m')
insert into person(id,pname,Gender)values(4,'raj','m')
insert into person(id,pname,Gender)values(5,'suhani','m')
insert into person(id,pname,Gender)values(6,'ravi','m')
create table friend(id int,fid int)
insert into friend(id,fid)values(1,2)
insert into friend(id,fid)values(1,3)
insert into friend(id,fid)values(1,5)
insert into friend(id,fid)values(2,3)
insert into friend(id,fid)values(1,4)
insert into friend(id,fid)values(1,6)
insert into friend(id,fid)values(6,2)
insert into friend(id,fid)values(6,3)
insert into friend(id,fid)values(3,2)
insert into friend(id,fid)values(3,2)
insert into friend(id,fid)values(3,1)
find person who is male and having more than two female friend
Asnswer : -
select id,count(fid) as numberOfFemaleFriend from friend where fid in(select id from person where gender='f')
and id in (select id from person where gender='m' )
group by id having count(fid) >2
OR You can use Inner Join
select f.id,p.pname,count(f.fid) as numberOfFemaleFriend
from person p
inner join friend f
on p.id=f.id and p.gender='m' and f.fid in
(select id from person where gender='f')
group by f.id,p.pname having(count(f.fid)>2)
| Is This Answer Correct ? | 2 Yes | 0 No |
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