题目内容

Each relational database table contains records (listed in _) and attributes (listed in ) .

A. columns; columns
B. columns; rows
C. rows; columns
D. rows; rows

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Each characteristic or quality of a particular entity is called a(n) ________.

A. attribute
B. field
C. instance
D. record

The category “student” is a(n) ________.

A. attribute
B. database
C. entity
D. instance

The ________ key is an identifier field that uniquely identifies a record.

A. alien
B. foreign
C. primary
D. secondary

Considering the following tables, ________ is a primary key. Student Table Professor Table Class Table SID Name Expected Graduation Year PID Name Tenure Year ID Name PID 123 Smith 2017 ABC Jones 1995 MGT101 Intro to Management ABC 234 Jones 2018 DEF Brilliant 2000 BUS101 Intro to Business ABC 567 Barilla 2018 GHI Genius 2000 MGT201 Intermediate Management GHI

A. Class Table: PID
B. Professor Table: Name
C. Student Table: Expected Graduation Year
D. Student Table: ID