Ajay,
I did not get the first part of your question
anonymous wrote : shouldn't the query actually be performed at the database level
!?!?
The query will be performed at the db only.
Do you mean a db procedure kind of thing? That will have other significant
disadvantages. So that query there looks fine.
About the second part, where the query seems to be fired in a loop - I think the goal
should be to fire less number of queries. Though it appears that the queries are fired in
a loop, but making query in that way actually will result in less number of queries (in
fact no query to db most of the time). If you try to aggregate values and fire query then
cache hit will not be possible most of the time.
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