Working and processing files, Database Management System

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Assignment Help:

1. Define each of the following IN YOUR OWN WORDS:

(a) File:

(b) Record:

(d) Primary Key:

(e) Secondary Key:

2. A travel agency wants to track the prices of its various packages. Package pricing differs by season (high and low). The input record should include package code, package description, vendor number, low season cost, low season dates (beginning and ending), high season cost, high season dates (beginning and ending), package markup percentage. Design the input record.

What is trigger? Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.

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Database systems have many opposite efforts ?

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