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Data Models into Database Designs

Data Models into Database Designs
Which of the following columns is(are) are required in a table?

An alternate key
A foreign key
A primary key
A surrogate key

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Data Models into Database Designs
For every relationship, how many possible sets of minimum cardinalities are there?

Three
Six
Two
Four

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Data Models into Database Designs
The DBMS allows surrogate keys to be changed.

True
False

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Data Models into Database Designs
Which constraint requires that the binary relationship indicate all combinations that must appear in the ternary relationship?

MUST COVER
MUST NOT
None of these
Both of the above

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Data Models into Database Designs
(STREET ADDRESS, CITY, STATE, ZIP) is an ideal primary key.

True
False

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Data Models into Database Designs
Cascading updates refers to child rows being automatically deleted when a parent row is deleted.

True
False

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