Cross tab output

Question

Hi,
Can someone help please?
I'm needing to produce the following output:
USERNAME JUN JUL AUG
Fred 10 0 5
Barney 0 6 1
I'm using the following SQL to produce 1 months data but I'm needing to produce it for 3, can anyone help
SELECT
u.user_id,
count(*),
FROM
non_imsnet_connection u,
npanet_login_tmp t
WHERE
(u.user_id=t.securnet_id OR u.user_id=t.login_id)
(AND u.connection_start >= to_date('01-06-2005','DD-MM-YYYY')
AND u.connection_start < to_date('01-07-2005','DD-MM-YYYY')
GROUP BY u.user_id
TIA

Answer 1

How about this:
SELECT
   u.user_id,
   sum(decode(to_char(u.connection_start, 'MM'), '06', 1, 0)) count_jun,
   sum(decode(to_char(u.connection_start, 'MM'), '07', 1, 0)) count_jul,
   sum(decode(to_char(u.connection_start, 'MM'), '08', 1, 0)) count_aug
FROM
  non_imsnet_connection u,
  npanet_login_tmp t
WHERE
  (u.user_id=t.securnet_id OR u.user_id=t.login_id)
  AND u.connection_start >= to_date('01-06-2005','DD-MM-YYYY')
  AND u.connection_start <  to_date('01-09-2005','DD-MM-YYYY')
GROUP BY u.user_id