Filter by grouped totals

Hi Experts,

I have a MySQL table similar to:

Sometimes agents take a deposit to go towards their commission, and they take may also more then they are entitled to for a particular sale, so the commission field can contain a positive or negative value.

I need to do a report  GROUPed BY location AND agent, but only include those groups (and list all sales details: date, qty, comment,) where the total commission for that group is > 0.  How can I do that?  Would I need a sub-query here?

Any help would be greatly appreciated.

APD TorontoAsked:
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lcohanDatabase AnalystCommented:
FROM YourTableNameHere
      (SELECT  agent, location, sum(commision) as totcom
      FROM YourTableNameHere
      GROUP BY location,agent
      HAVING sum(commision) > 0
      ) q

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