Explain Connect by Prior ?

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

Interview Candidate
Sep 7th, 2004
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deva

Sep 20th, 2006

connect by prior is used with the key word "level". Its used to get the records in the hierarchical manner.
Eg To get the empno of the employee who is working under manager. and the subordinates of this empno...and so on

rampratap409
Profile Answers by rampratap409 Questions by rampratap409

Dec 7th, 2006

select a.*, level from emp a
start with mgr is null
connect by mgr = prior empno