Query for mapping

Question

HI,
I have three tables
USERS -> USER_ID,NAME,ROLE
CIRCLES -> CIRCLE_ID,NAME
USER_CIRCLE_MAP -> USER_ID,CIRCLE_ID
I want a SQL query that returns all contents in circles table if USERS.ROLE is not 'END_USER'. IF users.role is 'END USER' I want all the circles from USER_CIRCLE_MAP related to only this user id.
Please help me.
Thanks,
Marutha

Answer 1

pretty much the same thing as ttt but I did an and/or instead of the union all
with users as
(select 1 user_id, 'Bob' name, 'END_USER' Role from dual union
select 2, 'Sue','TESTER'from dual),
circles as
(select 100 circle_id, 'circle one' name from dual union
select 200, 'circle two' from dual union
select 300, 'circle three' from dual
user_circle_map as
(select 1 user_id, 100 circle_id from dual union
  select 2, 300 from dual
select users.user_id, users.name, role, circles.circle_id, circles.name from
users, user_circle_map, circles
where users.user_id = user_circle_map.user_id
and   (
         (users.role = 'END_USER' and  circles.circle_id = user_circle_map.circle_id)
         or
         users.role != 'END_USER'
       ) Edited by: pollywog on Apr 9, 2010 12:24 PM