Step-by-Step Guide to Creating SQL Hierarchical Queries
How to master the CONNECT BY clause in Oracle to analyze hierarchical data | by Harinder | Quick Code | Medium
Oracle 11gR2 - alternative for CONNECT_BY_ISLEAF function for Recursive Subquery Factoring (dedicated to Anton) - AMIS, Data Driven Blog - Oracle & Microsoft Azure
Hierarchical Queries
Display immediate parent after CONNECT_BY_ROOT in Oracle PL SQL - Stack Overflow