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Introduction to Database System

Introduction to Database System
Which of the following indicates the minimum number of entities that must be involved in a relationship?

ERD
Greater Entity Count (GEC)
Minimum cardinality
Maximum cardinality

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

SAVE
COMMIT
PACK
ZIP

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Introduction to Database System
In SQL, which command is used to create a database user?

ADD USER TO DATABASE
CREATE USER
MK USER
All of the listed here

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Introduction to Database System
Which of the following is not characteristic of a relational database model?

complex logical relationships
tables
treelike structure
records

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Introduction to Database System
Every time attribute A appears, it is matched with the same value of attribute B, but not the same value of attribute C. Therefore, it is true that:

(B,C) →
A →
A → (B,C).
A →

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Introduction to Database System
Helping people keep track of things is the purpose of a(n) ________ .

instance
relationship
table
database

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