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1. Define each of the following IN YOUR OWN WORDS:
(a) File:
(b) Record:
(c) Field:
(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.
Field
No.
Item
Description
Field Name
Length
Data
Type
# of
Decimal
Places
Comments
Synonyms and Indexes Some of the essential properties of indexes are: An Index is a schema Object Indexes can be formed explicitly or automatically Indexes are m
Explain the Relational Completeness Codd described the term relational completeness to consider to a language that is complete with respect to first-order predicate calculus ex
Construct a clean ans concise ER diagram for the database indicating the cardinality mapping for Employee management syatem
Explain the Strategy of Database Planning ?
a. Define the term "deadlock". There are four conditions that must hold before deadlock is possible. Name them. b. Outline an algorithm that detects whether there is a deadlock.
each publisher has uniqe name a mial addrs are also kept on each pubisher.a publisher publish one book.a book publish y one publisher.book identified by isbn.each book writn by one
Can we delete data element, which is being used by table fields. No we cant delete data element.
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what is bogus empowerment. And what is genuine empowerment
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