Find 10 pieces of paper out of how many?!?!?
BBC News - Scottish referendum: Suspected electoral fraud in Glasgow probed
Here's my solution:
select id, count(*) from voters group by id having count(*) > 1;
BBC News - Scottish referendum: Suspected electoral fraud in Glasgow probed
Here's my solution:
select id, count(*) from voters group by id having count(*) > 1;
Comment