Need to find all the possible child records with SQL

Hello - I am trying to find a way to solve the following with a sql statement:

I have a table with columns, and the following values:
Trans_Id   Parent_Trans_id
1             null
2             1
3             2
4             3
So basically, 1 is the master parent and I need to bring all ranks, because they are all ultimately originated due to 1. How to write sql code to return all possible levels associated with parent_id = 1?

I hope I'm communicate that effectively do this, but please let me know if it needs to be clarified.

Any help is greatly appreciated...

Thank you
Christine

Hi, Christine.

I think you want to CONNECT BY, something like this:

SELECT     *
FROM     a
START WITH     trans_id      = 1
CONNECT BY     parent_trans_id      = PRIOR trans_id
;

I hope that answers your question.
If not, post a small example data (CREATE TABLE and only relevant columns, INSERT statements) and also publish outcomes from these data.
Explain, using specific examples, how you get these results from these data.
Always tell what version of Oracle you are using.
See the FAQ forum {message identifier: = 9360002}
You will find the answers better faster if you always provide this information whenever you post a question.

Tags: Database

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