Database System Concepts
Database System Concepts
7th Edition
ISBN: 9789332901384
Author: Henry F. Korth & S. Sudarshan Abraham Silberschatz
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 16, Problem 23E

a.

Explanation of Solution

To maintain the result of union and set difference operation:

  • The output of two query expressions can be combined into a single result using “UNION” operator.
  • The query expressions are independently executed and the resultant output is combined into a single result table...

b.

Explanation of Solution

To maintain the result of left outer join operation:

  • The result of query expression is calculated using “INTERSECT” operator...

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