Conditional exists in pure SQL.

Question

Hi,
I'm on 10.2.0.3 and got problem like this
create table big (id number , words varchar2(22));
insert into big values (1, 'aaa');
insert into big values (1, 'abc');
insert into big values (1, 'bbb');
insert into big values (1, 'ccc');
insert into big values(2, 'eee');
select * from big;
        ID WORDS
         1 aaa
         1 abc
         1 bbb
         1 ccc
         2 eee
           create table dic1 (data varchar2(22));
            insert into dic1 values('aaa');
            insert into dic1 values('bbb');
           create table dic2 (data varchar2(22));
           insert into dic2 values('eee');
           SQL> select * from dic1;
DATA
aaa
bbb
SQL> select * from dic2;
DATA
eee
select * from big
where
exists (select null from dic1 where instr(words,data) > 0);Now I want to compare big table with dic2 as well but only if column id from table big equals (id = 2) .
So I need kind of case statement with two exists subquery :
1- for dict1 and 2nd for dic2 but only if id = 2 .
Please advice.
Regards
GregG

Answer 1

Sorry for not being clear , actually I need that record too so first answer is ok
select *
  2        from big
  3       where
  4      exists (
  5               select null
  6            from (
  7                             select 1 id1, data from dic1
  8                         union all
  9                         select 2 id1, data from dic2
10                      )
11               where id = id1 and instr(words,data) > 0
12*           )
        ID WORDS
         1 aaa
         1 bbb
         2 eeeRegards
GregG
Edited by: GregG on Jul 27, 2011 1:20 PM