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Evaluation of Relational Operations

Evaluation of Relational Operations. Chapter 14, Part B (Joins). Schema for Examples. Sailors ( sid : integer , sname : string, rating : integer, age : real) Reserves ( sid : integer, bid : integer, day : dates , rname : string). Similar to old schema; rname added for variations.

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Join Algorithms

Join Algorithms. Chapter 14. Schema for Examples. Sailors ( sid : integer , sname : string, rating : integer, age : real) Reserves ( sid : integer, bid : integer, day : dates , rname : string). Similar to old schema; rname added for variations. Reserves:

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Implementation of Relational Operations: Joins

Implementation of Relational Operations: Joins. Schema for Examples. Sailors ( sid : integer , sname : string, rating : integer, age : real) Reserves ( sid : integer, bid : integer, day : dates , rname : string). Similar to old schema; rname added for variations. Reserves:

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126 views • 12 slides

Evaluation of Relational Operations

Evaluation of Relational Operations. Chapter 12, Part A. Relational Operations. We will consider how to implement: Selection ( ) Selects a subset of rows from relation. Projection ( ) Deletes unwanted columns from relation.

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187 views • 9 slides

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Evaluation of Relational Operations

Join Algorithms

Implementation of Relational Operations: Joins

Evaluation of Relational Operations