SQL Plus Interview Question:

Please Explain Connect by Prior?

Submitted by: Administrator

Retrieves rows in hierarchical order.e.g. select empno, ename from emp where.

"connect by prior" is clause which is used in hierarchical queries.Example
select ename,empno,mgr,job
from emp
start with job='PRESIDENT'
connect by prior empno=mgr;
Submitted by: Administrator