Think about a student database with the StudentID as the main key and the Major, Age, MaritalStatus, and HomeZipCode indexes (all secondary keys). If the institution requested a list of MIS or computer science majors who were over 25, married, and from the 45462 zip code OR computer engineering majors who were single and from the

Oracle 12c: SQL

3rd Edition

ISBN:9781305251038

Author:Joan Casteel

Publisher:Joan Casteel

Chapter9: Joining Data From Multiple Tables

Section: Chapter Questions

Problem 10HOA: An EMPLOYEES table was added to the JustLee Books database to track employee information. Display a...

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Transaction Processing

Transaction processing is a computational style generally performed by server computers, which supports interactive applications (apps). Transaction processing is also known as information processing, which divides the work into indivisible and individual operations called transactions. The transaction is a set of tasks; a single task is considered as the minimum processing unit that cannot be divided again.

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Think about a student database with the StudentID as the main key and the Major, Age, MaritalStatus, and HomeZipCode indexes (all secondary keys). If the institution requested a list of MIS or computer science majors who were over 25, married, and from the 45462 zip code OR computer engineering majors who were single and from the 45462 zip code, then let's pretend they were both over 25 and from the 45462 postcode. How can indexes be used to guarantee that only the data that satisfies this criteria is accessible to users?

Organized collection of structured information, or data, typically stored in a computer system.

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