Question

I tried this with solutions avaialble online, but none worked for me.

Table :
Id rank 
1  100
1  100
2  75
2  45
3  50
3 50

I want Ids 1 and 3 returned, beacuse they have duplicates.

I tried something like

 select * from A where rank in ( 
 select rank from A group by rank having count(rank) > 1

This also returned ids without any duplicates. Please help.

Answer 1

Try this:

select id from table
group by id, rank
having count(*) > 1