K-T I tweaked that query, I guess I tried to oversimplify it so that the parser wouldn't choke on it. Jacek >>> scisql_fluxToAbMag(uFlux_PS)-scisql_fluxToAbMag(gFlux_PS) + >>> > > scisql_fluxToAbMag(gFlux_PS)-scisql_fluxToAbMag(rFlux_PS) + >>> > > scisql_fluxToAbMag(rFlux_PS)-scisql_fluxToAbMag(iFlux_PS) + >>> > > scisql_fluxToAbMag(iFlux_PS)-scisql_fluxToAbMag(zFlux_PS) + >>> > > scisql_fluxToAbMag(zFlux_PS)-scisql_fluxToAbMag(yFlux_PS) < <x>; > I don't understand this query. Isn't the WHERE clause mathematically > equivalent to just u-y? ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the QSERV-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1