All switches are switched off. Let’s see the switch would look like when it was switched on.

The symbol (+) is used to show us that object is switched on. Perform a negation to state of object with NOT switch.

We switched on NOT operator. In order to mark new state, we used symbol (-). We defined our object.
Let’s see how we can use this image.

Condition analysis of filtering object                                 
Our object of filtration has 9 possible interior states. We had always mentioned that we would consider NULL test particularly.
 It means that we will consider 7 possible states of our object’s filtration. Every interior state of our object defines different
string value Where clause. Mark that string value with cxWhereCond. Show on graphic those 7 possible states.

                           1)  state order_date >= 23/05/1995

                     2)      state NOT order_date >= 23/05/1995

                   3)   state order_date <= 15/06/1995

                  4)  state NOT order_date <= 15/06/1995