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Introduction to Database System

Introduction to Database System
In SQL, which command is used to make permanent changes made by statements issue since the beginning of a transaction?

COMMIT
PACK
SAVE
ZIP

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Introduction to Database System
A network schema

permits many-to-many relation¬ships
stores data in tables
restricts the structure to a one-to-many relationship
All of the listed here

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Introduction to Database System
Which command(s) is(are) used to enable/disable/drop an integrity constraint in SQL?

MODIFY TABLE
ALTER TABLE
DEFINE TABLE
All of the listed here

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Introduction to Database System
A ternary relationship is so called because in contains two entities and one association between them.

False
True

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Introduction to Database System
The data dictionary tells the DBMS

what files are in the database
what attribute are possessed by the data
what these files contain
All of the listed here

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Introduction to Database System
It is more accurate to define a _____ as a variety of different record types that are treated as a single unit

Flat File
Record
Table
Database
None of these

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