>>The parenthesis are to keep its order of operations straight. You do need to be careful with them and OR conditions to be sure you receive the correct results.
>>When I have optional parameters, they're usually to filter the result set, so not sending that parameter would have no effect. The WHERE clause in that case looks like IIF(EMPTY(?vp_optional, .T., table.optional = ?vp_optional). I don't use NULLs, but you should be able to adapt that for them.
>>
>>Chris.
>
>Hi Chris,
>
>Are you able to put it in the View Designer? Could you please post one of your views using this technique so I may try to adopt it for my needs?
>
>Right now I'm playing with my original idea from the program. I was unable to save this view in View Editor.

This is my best/worst view, depending on how you look at it. All it does is create a list of records that meet six fully optional specified conditions. The last two options pull records from other views (or not).

SELECT Enroll.enrollid;
 FROM ;
     smagic!enroll;
 WHERE ( ( ( ( (  IIF(EMPTY(?vp_scheduleid),.T.,Enroll.scheduleid=(?vp_scheduleid)) ;
   AND  IIF(EMPTY(?vp_programid),.T.,Enroll.programid=(?vp_programid))  );
   AND  IIF(EMPTY(?vp_startdateid),.T.,Enroll.startdateid=(?vp_startdateid))  );
   AND  IIF(EMPTY(?vp_enddateid),.T.,Enroll.enddateid=(?vp_enddateid))  );
   AND  (  EMPTY(?vp_actionid) ;
   OR  Enroll.enrollid IN (SELECT enrollid FROM v_actionflag) ) );
   AND  (  EMPTY(?vp_hasflag) ;
   OR  Enroll.enrollid IN (SELECT enrollid FROM v_mustflag) ) );
   AND  Enroll.enrollid NOT IN (SELECT enrollid FROM v_notflag)