SELECT o.state, dec.total, jan.total, feb.total, count(*)
FROM
(
    SELECT state, to_char(order_date, 'Mon'), count(*) total
    FROM web_order
    WHERE order_date BETWEEN '01-DEC-02' AND '31-DEC-02'
    GROUP BY state, to_char(order_date, 'Mon')
) dec,
(
    SELECT state, to_char(order_date, 'Mon'), count(*) total
    FROM web_order
    WHERE order_date BETWEEN '01-JAN-03' AND '31-JAN-03'
    GROUP BY state, to_char(order_date, 'Mon')
) jan,
(
    SELECT state, to_char(order_date, 'Mon'), count(*) total
    FROM web_order
    WHERE order_date BETWEEN '01-FEB-03' AND '28-FEB-03'
    GROUP BY state, to_char(order_date, 'Mon')
) feb,
web_order o
WHERE o.order_date BETWEEN '01-DEC-02' AND '28-FEB-03'
GROUP BY o.state, dec.total, jan.total, feb.total