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Introduction to Database System

Introduction to Database System
In a relation, the order of the columns does not matter.

False
True

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Introduction to Database System
A relational database management (RDBM) package manages data in more than one file at once. How does it organize these file? As

tables
relations
both (a) and (b)
tuple
None of these

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Introduction to Database System
In a _____ a parent record type can be linked to one or more "child" record types, but a child record type can have only one parent.

Hierarchical database
Relational database
Distributed database
Network database

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Introduction to Database System
A list consists of last names, first names, addresses, and pin codes if all people in the list have the same last and the same pin code, a useful key would be

a compound key consisting of the first name and the last name
the last name
None of these
All of these
the pin code

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Introduction to Database System
A file produced by a spreadsheet

all of the listed here
is generally stored on disk in an ASCII text format
can be used as it by the DBMS
can be used for graphic

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Introduction to Database System
Which of the following is not a restriction for a table to be a relation?

All of the entries in any column must be of the same kind.
The columns must be ordered.
No two rows in a table may be identical.
The cells of the table must contain a single value.

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