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Introduction to Database System

Introduction to Database System
Structured Query Language (SQL) is an internationally recognized standard language that is understood by all commercial database management system products.

True
False

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Introduction to Database System
A key:

identifies a row.
must always be composed of two or more columns.
identifies a column.
can only be one column.

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Introduction to Database System
A command that lets you change one or more fields in a record is

All of these
Modify
Insert
None of these
Look-up

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Introduction to Database System
Which of the following indicates the minimum number of entities that must be involved in a relationship?

Maximum cardinality
Greater Entity Count (GEC)
ERD
Minimum cardinality

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Introduction to Database System
A database design may be based on existing data.

False
True

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Introduction to Database System
The index consists of

All of these
both (a) and (b)
None of these
a list of keys
pointers to the master list

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