[英]Oracle Hierarchical Query Connect by Parent Child Tree Unknown level deep?
Oracle Hierarchical Query Connect by Parent Child Tree Unknown level deep? Oracle父级树查询分层查询连接未知级别深吗? Simple yet I cannot seem to make it work... 很简单,但我似乎无法使其正常工作...
Table ABC
ID parent_ID Name
1 0 Art
2 0 Home
3 0 Contact
4 0 Bob
5 0 Boo
6 0 Foo
7 2 FooBoo
8 5 Hoo
9 8 My
10 2 Rob
Order by Name Results wanted
Art
Home
** FooBoo
** Rob
Contact
Bob
Boo
** Hoo
** ** My
Foo
FooBoo
SELECT NAME, id, parent_id, LEVEL
FROM ABC
START WITH id = 0
CONNECT BY PRIOR id = parent_id
ORDER SIBLINGS BY NAME;
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