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Hierarchical queries - PowerPoint PPT Presentation

Chapter 8

Chapter 8. Hierarchical Queries. Representing Hierarchical Information (1/2).

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Hierarchical Retrieval

Hierarchical Retrieval. Objectives. After completing this lesson, you should be able to do the following: Interpret the concept of a hierarchical query Create a tree-structured report Format hierarchical data Exclude branches from the tree structure. Sample Data from the EMPLOYEES Table.

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Hierarchical Retrieval

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Chapter 5

Chapter 5. Advanced SQL. DL 1900 UA 1830. CHI. UA 1500. NY. DEN. DL 1530. UA 930. UA 1400. SFO. DL 1500. LAS. DL 900. DAL. DL 852. Recursion in SQL. Example . Let Flights( Flight# , Source_City, Dest_City) be a relational schema.

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Hierarchical queries - PowerPoint PPT Presentation

Chapter 8

Hierarchical Retrieval

Hierarchical Retrieval

Chapter 5