Código Delphi
[-]
Query1.Close;
Query1.SQL.Clear;
Query1.SQL.Add ('Select *');
Query1.SQL.Add ('FROM Load.db');
Query1.SQL.Add ('WHERE OT = ' + Edit1.Text);
Query1.SQL.Add ('AND Sub =' + quotedstr(Edit2.text));
Query1.Open;
tambien podrías utilizar parámetros...