Possible to do a delete with a HAVING clause?

Question

I want to do something like below:

DELETE UserPredictions
  GROUP BY UserId
  HAVING COUNT(*) < 500

But I\'m getting a syntax error. Is

Answer 1

Not really. The having clause implies an aggregation, which means you don't have the original rows any more.

I think you want the following:

DELETE from UserPredictions
where UserId in (select UserId from UserPredictions group by UserId having count(*) < 500)