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Introduction to Database System

Introduction to Database System
A candidate key is a determinant that determines all the other columns is a relation.

True
False

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Introduction to Database System
The main idea behind computer files is that it is convenient to

arrange them
create them
access them
store information together

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Introduction to Database System
In a relational schema, each tuple is divided into fields called

Relations
All of the listed here
Domains
Queries

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Introduction to Database System
In the relational model, relationships between relations or tables are created by using:

candidate keys.
determinants.
composite keys.
foreign keys.

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Introduction to Database System
In SQL, GRANT command is used to

grant system privileges, roles, and object privileges to uses and roles
allow user to access databases
allow user to create databases
None of the listed here

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Introduction to Database System
Which command(s) is(are) used to redefine a column of the table in SQL ?

DEFINE TABLE
ALTER TABLE
all of the listed here
MODIFY TABLE

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