How to make a perfect validations between two dates..?

Question

Hello,
i want to check this code with u christian pls,
DECLARE
V_MESSAGE NUMBER(2);
V_TO_DATE DATE ;
V_FROM_DATE DATE;
CURSOR MATERIALS IS
               SELECT MATERIAL_CODE,TO_DATE,FROM_DATE
               FROM PLN_TANK_MATERIALS
               WHERE TANK_CODE= :PLN_TANK_MATERIALS.TANK_CODE;
BEGIN
     FOR I IN MATERIALS
     LOOP
          IF (:FROM_DATE > I.FROM_DATE ) AND (:TO_DATE < I.TO_DATE ) THEN          
               V_MESSAGE := FUNC_MSG(1,'CASE 1');      
          RAISE FORM_TRIGGER_FAILURE;          
          ELSIF (:FROM_DATE > I.FROM_DATE ) AND (:TO_DATE > I.TO_DATE ) THEN     
               V_MESSAGE := FUNC_MSG(1,'CASE2');
          RAISE FORM_TRIGGER_FAILURE;
          ELSIF (:FROM_DATE < I.FROM_DATE ) AND (:TO_DATE > I.FROM_DATE ) THEN     
               V_MESSAGE := FUNC_MSG(1,'CASE3');
          RAISE FORM_TRIGGER_FAILURE;     
          ELSIF (:FROM_DATE < I.FROM_DATE ) AND (:TO_DATE > I.TO_DATE ) THEN     
               V_MESSAGE := FUNC_MSG(1,'CASE4');
                         RAISE FORM_TRIGGER_FAILURE;     
          ELSIF (:FROM_DATE = I.FROM_DATE)OR (:TO_DATE = I.TO_DATE )
                    OR (:FROM_DATE = I.TO_DATE)OR (:TO_DATE = I.FROM_DATE ) THEN     
                    V_MESSAGE := FUNC_MSG(1,'CASE5');
               RAISE FORM_TRIGGER_FAILURE;
          END IF;          
     END LOOP;          
END;
=========================================================
Regards ,
Abdetu..

Answer 1

i want to check this code with u christian plsnote that I am more Database PL/SQL Developer than Forms Developer...
also note that I am earning 20 Bucks/Code Review :D
But it would be nice to tell me your problem with the upper source, than maybe I can help u...
best regards
Christian