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Level « Hierarchical Query « Oracle PL / SQL
Oracle PL / SQL
Hierarchical Query
Level
1.
Using the LEVEL Pseudo-Column:display the level in the tree
2.
Use the COUNT() function and LEVEL to get the number of levels in the tree
3.
Traversing Upward Through the Tree
4.
sort by LEVEL
5.
pseudocolumn LEVEL and an example of using the levels with an update.
6.
pseudocolumn LEVEL and an example of using the levels.
7.
Browse Products with three level nested queries