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Recursive Subquery Factoring의 한가지 활용 예오라클/SQL 튜닝 2010/12/01 17:46 Oracle 11gR2부터 Recursive Subquery Factoring이라는 기능을 제공합니다. 이 기능을 이용하면 Connect By 구문을 대신할 수 있죠. 아래에 간단한 사용법이 있습니다.SQL> select lpad(' ', 2 * level - 2, ' ') || ename as ename 2 , empno 3 , mgr 4 , level 5 from emp 6 connect by mgr = prior empno 7 start with mgr is null 8 / SQL> with emps (ename,empno,mgr,lvl) as 2 ( select ename 3 , ..

Recursive WITH clause - to implement Connect By featuresORACLE 11g release 2 introduced the recursive WITH clause as an alternative to the well known CONNECT BY clause. This blog entry shows how to implement all CONNECT BY features in Recursive WITH clause. CONNECT BY clause to show all employees starting with KING (who has no manager [mgr IS NULL]): rajesh@ORA11G> select empno,ename,mgr 2 from ..

developerWorks Technical topics Information Management Technical library Port CONNECT BY to DB2 A recipe to map recursive queries from Oracle to DB2 using recursive common table expressions Using examples, this article describes step-by-step how to map CONNECT BY syntax and its associated pseudo columns to common table expressions that work in DB2® Universal Database™ (DB2 UDB) for Linux®, UNIX®..