Help needed with a query

Question

I have two tables as follows:
-- INSERTING into TABLE1
Insert into TABLE1 (CUSTOMERID,CUSTOMERNAME,EMPCODE) values ('1','ABC',null);
Insert into TABLE1 (CUSTOMERID,CUSTOMERNAME,EMPCODE) values ('2','DEF','EMP123');
Insert into TABLE1 (CUSTOMERID,CUSTOMERNAME,EMPCODE) values ('3','AAD','EMP156');
Insert into TABLE1 (CUSTOMERID,CUSTOMERNAME,EMPCODE) values ('4','DEFJK','EMP256');
Insert into TABLE1 (CUSTOMERID,CUSTOMERNAME,EMPCODE) values ('5','AWER',null);
Insert into TABLE1 (CUSTOMERID,CUSTOMERNAME,EMPCODE) values ('6','AWRT','EMP167');
-- INSERTING into TABLE2
Insert into TABLE2 (EMPCODE) values ('EMP123');
Insert into TABLE2 (EMPCODE) values ('EMP156');
Insert into TABLE2 (EMPCODE) values ('EMP256');
I would like to get results something as follows:
Customer_id   CustomerName     Employee
1     ABC     N
2     DEF     Y
3     AAD     Y
4     DEFJK     Y
5     AWER     N
6     AWRT     YI would like to get the Employee column as Y or N, if the EmpCode in Table1 is found in Table2..
How can i achieve this in a single query..
Any help will be very helpful..

Answer 1

test@ora>
test@ora>
test@ora> --
test@ora> with table1 as (
  2    select '1'as customerid,'ABC' as customername, null as empcode from dual union all
  3    select  '2','DEF','EMP123'   from dual union all
  4    select  '3','AAD','EMP156'   from dual union all
  5    select  '4','DEFJK','EMP256' from dual union all
  6    select  '5','AWER',null      from dual union all
  7    select  '6','AWRT','EMP167'  from dual),
  8  table2 as (
  9    select 'EMP123' as empcode from dual union all
10    select 'EMP156' from dual union all
11    select 'EMP256' from dual)
12  --
13  select t1.customerid,
14         t1.customername,
15         nvl2(t2.empcode,'Y','N') as employee
16  from table1 t1, table2 t2
17  where t1.empcode = t2.empcode(+)
18  order by t1.customerid;
C CUSTO E
1 ABC   N
2 DEF   Y
3 AAD   Y
4 DEFJK Y
5 AWER  N
6 AWRT  N
6 rows selected.
test@ora>
test@ora>isotope