I know that - just wanted to show how I found out
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>Nothing prevents you from using a field alias in your example.
>
>>I know that 'construct' since I use it like in
>>
>>select product ,;
>> sum(realcost) ;
>> from ... ;
>> into array aa ;
>> group by 1 ;
>> having ( sum(realcost) > 222 )
>>
Gregory