... 0. For example: WM_CONTAINS(TO_DATE('01-01-1980', 'MM-DD-YYYY'), TO_DATE('01-01-1990', 'MM-DD-YYYY') TO_DATE('01-01-1985', 'MM-DD-YYYY'), ... TO_DATE('01-01-1988', 'MM-DD-YYYY') = 1WM_CONTAINS(TO_DATE('01-01-1980', 'MM-DD-YYYY'), TO_DATE('01-01-1990', 'MM-DD-YYYY') TO_DATE('01-01-1985', ... 'MM-DD-YYYY') TO_DATE('01-01-1980', 'MM-DD-YYYY'), TO_DATE('01-01-1990', 'MM-DD-YYYY') = 1WM_EQUALS(TO_DATE('01-01-1980', 'MM-DD-YYYY'),...