Hierarchical retrieval
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In ORACLE 10G(SQL)
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SQL ORACLE 10g (hierarchical structure)
Transcript of Hierarchical retrieval
In ORACLE 10G(SQL)
OBJECTIVES
Introduction to Hierarchical Retrieval
Hierarchical Queries
Walking the tree
Formatting Hierarchical reports by using LEVEL and LPAD
Prunning branches
Advantages
Summary
INTRODUCTION
Hierarchical Retrieval retrives data based on natural hierarchical relationship between rows in table.
Advantages
Hierarchical trees are used in various fields like
1. Human genealogy,
2. corporate management,
3. manufacturing,
4. evolutionary research,
5. scientific reasearch
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