Question

I have some data of the form

Key    ID      Link        1      MASTER  123 2      AA      123 3      AA      123 4      BB      123 5      MASTER  456 6      CC      456 

I would like to be able to select in the same select all linked items matching the selection criteria, plus the linked master. For example, if I have an ID of ‘AA’, I want the rows with ID = ‘AA’ to be returned, plus the row with ID = ‘MASTER’ and a link of 123:

1      MASTER  123 2      AA      123 3      AA      123 

I’m using Oracle 10.2g, so if any special Oracle syntax will make this easier, then that would be ok.

Answer 1

Here’s one method.

SELECT DISTINCT key, id, link   FROM the_table   START WITH id = 'AA'   CONNECT BY id = 'MASTER' and link = PRIOR link and 'AA' = PRIOR ID