Parent Child Relationship in the table to be queried.

Question

Hi guys,
I have the below query.
Table 1:
Column_name Reference
Value1 Value1
Value2 Value1
Table 2:
Column_name Attributes(child Elements)
Value1 Child1
Value1 Child2
Now my query is to retrieve records as below using both the tables.
Value1
Value1.Child1
Value1.Child2
Value2
Value2.Child1
Value2.Child2
How can I get such ?
Regards,
SQL Developer.

Answer 1

Hi,
As Alex said, you should have tried by joining them.
With Parent As (
select 'Value1' p_col1,'Value1' P_col2 from dual union all
select 'Value2','Value1' from dual),
child as (
select 'Value1' c_col1,'Child1' c_col2 from dual union all
select 'Value1','Child2' from dual)
-- End of sample data
select p_col1,null c_col2 from parent
union
select p_col1,c_col2 from parent,child
where p_col2=c_col1
order by p_col1,c_col2 desc
PRAZY@11gR1> /
P_COL1 C_COL2
Value1
Value1 Child2
Value1 Child1
Value2
Value2 Child2
Value2 Child1
6 rows selected.
Elapsed: 00:00:00.03Regards,
Prazy