Hi Mark,

Actually you can have more than one GROUP BY, and do not have to reference it by number.

>In a UNION, you can only have 1 GROUP BY and 1 ORDER BY and each has to e after the last UNION SQL. You also have to reference the GROUP BY and ORDER BY items by number. How about something like:

>select Field1, sum(Field2) from Table1;
>     where Field3 <> "XXX";
>union select Field1, sum(Field2) from Table2;
>     where Field3 <> "XXX";
>     and Field1 not in (select field1 from table1);
>     group by 1
>