sql - COUNT within a WHERE clause or HAVING? -


this trying achieve;

select  count(distinct no)   table   (type = 1 , count(distinct no) > num)  or (type = 2 , count(distinct no) > num)  group week

what best way achieve this?

thanks

any aggregate comparisons need go having clause after group by. remember may different results depending on put non-aggregate conditional, because you'll aggregating on you've included/excluded via where.

ie

select count(distinct no)  table  type = 1 group week having count(distinct no) > num

may different from

select count(distinct no)  table  group week having count(distinct no) > num , type = 1

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