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Questions and Answers
What does the term 'domain' refer to in the context of data modeling?
What does the term 'domain' refer to in the context of data modeling?
- The primary key of a relational database table
- The set of acceptable values that a column is allowed to contain (correct)
- The set of all possible data types in a database
- The total number of records in a database
Which of the following best represents a domain in the given context?
Which of the following best represents a domain in the given context?
- The set of all floating-point numbers greater than 0 and less than 200,000 (correct)
- The total number of records in a database
- The primary key of a database table
- The set of all possible data types in a database
In the given context, what does the domain of 'First Name' represent?
In the given context, what does the domain of 'First Name' represent?
- The set of all possible days in a week
- The set of acceptable values for a primary key
- The set of all floating-point numbers greater than 0 and less than 200,000
- The set of character strings that represent names of people (correct)
In the context of a table, what does 'degree' refer to?
In the context of a table, what does 'degree' refer to?
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What do records/tuples in a table contain?
What do records/tuples in a table contain?
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What is the degree of a table with 6 attributes?
What is the degree of a table with 6 attributes?
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Study Notes
Data Modeling Context
- In the context of data modeling, a domain refers to the set of possible values that an attribute or field can take.
Domain Representation
- A domain is best represented by the set of all possible values that an attribute can have.
Domain of 'First Name'
- The domain of 'First Name' represents the set of all possible first names that can be entered into a database or table.
Degree in a Table
- In the context of a table, the degree refers to the number of attributes or fields in the table.
Records/Tuples in a Table
- Records or tuples in a table contain a single value for each attribute or field.
Degree of a Table
- The degree of a table with 6 attributes is 6.
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Description
Test your knowledge of fundamental concepts related to domains in database management with this quiz. Explore the original sets of atomic values used to model data and the acceptable values that columns can contain.
