>>>What exactly IS VFP 9's problem with this (remember I've only been using 9 for 2 months now)
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>>This query also needs a group by jobheads.JobID. All fields which are not in aggregate function MUST be listed in GROUP BY. So, the rule is very simple: either field should be one of the aggregate functions (MIN, MAX, AVG, COUNT, SUM) or it should be in GROUP BY list of the fields.
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>Thanks. That's how I read it in Help but didn't think it meant you had top have ALL non-agg fields. Is this new to 8/9 cos I don't recall having to do this in the past - I thought only the fields you wanted,say, a printing group header break on?

Yes, this is new in VFP8 and VFP9 and this is ANSI SQL standard. It should be documented in Help under SET ENGINEBEHAVIOR.