Question

Given a simple (id, description) table t1, such as

id  description --  ----------- 1   Alice 2   Bob 3   Carol 4   David 5   Erica 6   Fred 

And a parent-child relationship table t2, such as

parent  child ------  ----- 1       2 1       3 4       5 5       6 

Oracle offers a way of traversing this as a tree with some custom syntax extensions:

select parent, child, sys_connect_by_path(child, '/') as 'path' from t2 connect by prior parent = child 

The exact syntax is not important, and I’ve probably made a mistake in the above. The important thing is that the above will produce something that looks like

parent  child  path ------  -----  ---- 1       2      /1/2 1       3      /1/3 4       5      /4/5 4       6      /4/5/6 5       6      /5/6 

My question is this: is it possible to join another table within the sys_connect_by_path(), such as the t1 table above, to produce something like:

parent  child  path ------  -----  ---- 1       2      /Alice/Bob 1       3      /Alice/Carol ... and so on... 

Answer 1

In your query, replace T2 with a subquery that joins T1 and T2, and returns parent, child and child description. Then in the sys_connect_by_path function, reference the child description from your subquery.