How to get empty veriables names.(Which veriables still Whole empty.
i want empty names of obt01 .........to obt24 for max01........to max24

SELECT Examtran.scode, Examtran.lcode, Examtran.sec, Examtran.examcode,;
  Examtran.code, Examtran.max01, Examtran.max02, Examtran.max03,;
  Examtran.max04, Examtran.max05, Examtran.max06, Examtran.max07,;
  Examtran.max08, Examtran.max09, Examtran.max10, Examtran.max11,;
  Examtran.max12, Examtran.max13, Examtran.max14, Examtran.max15,;
  Examtran.max16, Examtran.max17, Examtran.max18, Examtran.max19,;
  Examtran.max20, Examtran.max21, Examtran.max22, Examtran.max23,;
  Examtran.max24, Examtran.obt01, Examtran.obt02, Examtran.obt03,;
  Examtran.obt04, Examtran.obt05, Examtran.obt06, Examtran.obt07,;
  Examtran.obt08, Examtran.obt09, Examtran.obt10, Examtran.obt11,;
  Examtran.obt12, Examtran.obt13, Examtran.obt14, Examtran.obt15,;
  Examtran.obt16, Examtran.obt17, Examtran.obt18, Examtran.obt19,;
  Examtran.obt20, Examtran.obt21, Examtran.obt22, Examtran.obt23,;
  Examtran.obt24;
 FROM ;
     examtran;
 WHERE  Examtran.examcode = ( "August 05" );
  .and.!empty(max01).and.!empty(max02);
 ORDER BY Examtran.lcode, Examtran.sec;