connect by level oracle example

Oracle Oracle Product Services and Technology level introduction Many friends ask the genuine Oracle database products and pirated products are mainly different, in fact, from the product technology itself, the difference is not small, can

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Connect by prior recursive algorithm for tree data (parent/child data) retrieval in Oracle 1. Complete example: Select PID, ID, name, deptid, level, sys_connect_by_path (name ,'/'), connect_by_root PID as rootid from t_wf_eng_wfkind where deptid

Find the leader with employee number 7369: 1 SELECT level,e.* from EMP E CONNECT by PRIOR e.mgr = e.empno 78762 order by level DESC ' Start with '--this identifies all level=1 nodes "Connect by"--describes you to walk from the parent nodes above

Find leaders with employee number 7369:1 SELECT level,e.* from EMP E CONNECT by PRIOR e.mgr = E.empno START with e.empno = 78762 ORDER by Level DESC' Start with '--this identifies all level=1 nodes in the tree"Connect By" – describes how to walk

Detailed description of start with... connect by statement   Simple tree query for Oracle (recursive query) Deptid Paredeptid Name Number Number Char (40 bytes) Department ID Parent department ID

Content from: Oracle®database SQL Language Reference 11g Release 2 (11.2) e41084-03.Empolyees table from the HR scheme, warehouses from the OE scheme. If your table contains hierarchical data, you can use hierarchical query clauses to select

recursive queries in Oracle can be used by: Select, start with, connect by.. Prior The following describes the common ways in which tree queries are used in Oracle, with only one table involved. I. Build a TABLE statement:--Menu directory Structure

Reprinted from: http://blog.csdn.net/leshami/article/details/5917103The Oracle client connection to the Oracle database server looks different from the network configuration in SQL serve, except that all SQL Server runs on the Windows platform, so

If the table contains hierarchical data, you can use the Hierarchy query clause to select the row-level order. 1. The grammar of the hierarchy query clause Hierarchy query clause syntax: {CONNECT by [nocycle] condition [and condition] ... [START