Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Topological Sort
Topological sort is a sorting technique that sets up a hierarchy in a process. In this technique, when a directed network has nodes connected by arrows, the root node is placed before the successor node.
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Use the predicate symbols shown.

Everyone with red hair has freckles. Someone has red hair and big feet. Everybody who doesn’t have green eyes doesn’t have big feet. Therefore someone has green eyes and freckles. R(x), F(x), B(x), G(x)

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