DataObject::get("PersonPage",
    			  "TipNr < 1",
    			  "",
          		  "",
          		 "");

works fine and I get all entries where no number is set and the field is default 0.

DataObject::get("PersonPage",
    			  "TipNr > 1",
    			  "",
          		  "",
          		 "");

and

DataObject::get("PersonPage",
    			  "TipNr != 1",
    			  "",
          		  "",
          		 "");

don't work. I get no result. Is it not possible to use sql "greaterThan" or "isNot" in the Where-clause?

I just saw that

DataObject::get("PersonPage",
          "TipNr < 1",
          "",
          "",
          "");

gives back a result but the boolean lower than is not interpreted.

e.g.

DataObject::get("PersonPage",
          "TipNr < 5",
          "",
          "",
          "");

gives back the same result inculded records with tipNr 7,8 ...

So i thinck it's not possible to use lessthan,greaterthan or isNot with DataObject::get and i have to do it with sqlquery. is it right?

The failure was that i tried a DataObject::get with an object that inherits from a Page. It's not possible to filter Page Objects like above. When the the Object inherits from DataObject evrything works

extends Page

vs.

extends DataObject.

Solved.