ALTER TABLE DEGREE DROP COLUMN DEGREE.CONCRETE_CLASS_FOR_DEGREE_CURRICULAR_PLANS;
ALTER TABLE DEGREE_CURRICULAR_PLAN DROP COLUMN DEGREE_CURRICULAR_PLAN.CONCRETE_CLASS_FOR_STUDENT_CURRICULAR_PLANS;
ALTER TABLE DEGREE_CURRICULAR_PLAN DROP COLUMN DEGREE_CURRICULAR_PLAN.OJB_CONCRETE_CLASS;
ALTER TABLE STUDENT_CURRICULAR_PLAN DROP COLUMN STUDENT_CURRICULAR_PLAN.OJB_CONCRETE_CLASS;