Question

I have a little wired issue.
I have to select two count from query Likes and Collects but when I add second query instead of 2 likes and 10 collects I get 10 likes and 10 collects.
What am I doing wrong here?

select  COUNT(tl.ItemLikeId) as a, COUNT(tib.PacketId) as b
from Items i
left join ItemLikes il
on il.ItemId = i.ItemId
left join ItemsInPackets iip
on iip.ItemId = i.ItemId
where i.ItemId = 14591

Answer 1

Try SELECT COUNT(DISTINCT tl.ItemLikeId) AS a, COUNT(DISTINCT tib.PacketId) as b.

Your join gives you ten rows, so you have ten IDs from each table. However, not all of the IDs are unique. You’re looking for unique IDs.