Case to query multiple values and return single value to different table

Question

Hi this is my first table:
with Table_1
as
      select 'CAR' Object, 2000 Policy    from dual
      union all
      select 'BIKE' Object, 2000 Policy  from dual
      union all
      select 'HOUSE' Object, 2000 Policy  from dual
      union all
      select 'MOBILE' Object, 2000 Policy  from dual
      union all
      select 'MONEY' Object, 2000 Policy  from dual
      union all
      select 'CREDIT' Object, 2000 Policy  from dual
      union all
      select 'SCOOTER' Object, 2001 Policy    from dual
      union all
      select 'BIKE' Object, 2001 Policy  from dual
      union all
      select 'BEACH' Object, 2001 Policy  from dual
      union all
      select 'HOUSE' Object, 2001 Policy  from dual
      union all
      select 'MONEY' Object, 2001 Policy  from dual
      union all
      select 'CREDIT' Object, 2001 Policy  from dual
      union all
      select 'DOOR' Object, 2002 Policy    from dual
      union all
      select 'BIKE' Object, 2002 Policy  from dual
      union all
      select 'GARDEN' Object, 2002 Policy  from dual
      union all
      select 'MOBILE' Object, 2002 Policy  from dual
      union all
      select 'MONEY' Object, 2002 Policy  from dual
      union all
      select 'CREDIT' Object, 2002 Policy  from dual
select * from Table_1I need to Query the object column of table_1 for CAR or HOUSE and if they are present then returns 'Y' otherwise 'N'. This table_1 will link to table_2 via Policy and the result will be table_3
with Table_2
as
      select '21' AGE, 2000 Policy  from dual
      union all
      select '22' AGE, 2001 Policy from dual
      union all
      select '27' AGE, 2002 Policy from dual
select * from Table_2
with Table_3
as
      select '21' AGE, 2000 Policy, 'Y'  Many_Obj    from dual
      union all
      select '22' AGE, 2001 Policy,  'Y' Many_Obj from dual
      union all
      select '27' AGE, 2002 Policy,  'N' Many_Obj from dual
select * from Table_3Thanks in advance
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Answer 1

Thanks for the insert statements.
Here is one way
with Table_1
as
      select 'CAR' Object, 2000 Policy    from dual
      union all
      select 'BIKE' Object, 2000 Policy  from dual
      union all
      select 'HOUSE' Object, 2000 Policy  from dual
      union all
      select 'MOBILE' Object, 2000 Policy  from dual
      union all
      select 'MONEY' Object, 2000 Policy  from dual
      union all
      select 'CREDIT' Object, 2000 Policy  from dual
      union all
      select 'SCOOTER' Object, 2001 Policy    from dual
      union all
      select 'BIKE' Object, 2001 Policy  from dual
      union all
      select 'BEACH' Object, 2001 Policy  from dual
      union all
      select 'HOUSE' Object, 2001 Policy  from dual
      union all
      select 'MONEY' Object, 2001 Policy  from dual
      union all
      select 'CREDIT' Object, 2001 Policy  from dual
      union all
      select 'DOOR' Object, 2002 Policy    from dual
      union all
      select 'BIKE' Object, 2002 Policy  from dual
      union all
      select 'GARDEN' Object, 2002 Policy  from dual
      union all
      select 'MOBILE' Object, 2002 Policy  from dual
      union all
      select 'MONEY' Object, 2002 Policy  from dual
      union all
      select 'CREDIT' Object, 2002 Policy  from dual
Table_2
as
      select '21' AGE, 2000 Policy  from dual
      union all
      select '22' AGE, 2001 Policy from dual
      union all
      select '27' AGE, 2002 Policy from dual
SELECT
     age,
     policy,
     Many_Obj
from
SELECT
     t2.age,
     t2.policy,
     CASE
          WHEN SUM(
                    CASE
                         WHEN t1.object IN ('CAR','HOUSE')
                         THEN 1
                         ELSE 0
                    END) over( PARTITION BY t2.age,t2.policy) > 0
          THEN 'Y'
          ELSE 'N'
     END Many_Obj,
     row_number() over (PARTITION BY t2.age,t2.policy order by 1) rn
FROM
     Table_1 t1,
     Table_2 t2
WHERE
     t1.policy = t2.policy
where rn = 1;
AGE POLICY                 MANY_OBJ
21  2000                   Y       
22  2001                   Y       
27  2002                   N        I would advise you to spend some time learning analytic questions and using CASE expressions.