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Questions and Answers
What does data security refer to?
Data integrity ensures that data is accessed by its intended users.
False
What is a foreign key?
A primary key appearing in another table.
Data integrity refers to the _____ of data.
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Which of the following is NOT a means of preserving data integrity?
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Give an example of a domain constraint.
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Domain constraints allow for any value to be set for an attribute.
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Which statement about referential integrity is true?
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Match the following concepts with their definitions:
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Study Notes
Data Security vs Data Integrity
- Data security focuses on preventing unauthorized access to data.
- Data integrity focuses on ensuring the accuracy and consistency of data within a database.
- Data security mechanisms prevent corruption, while data integrity mechanisms ensure completeness and structural soundness.
- Data security protects data from unauthorized users, while data integrity verifies data accuracy and consistency.
Domain Constraints
- Domain constraints define the acceptable values for an attribute in a table.
- A domain constraint specifies a data type and adds constraints like NOT NULL, UNIQUE, PRIMARY KEY, FOREIGN KEY, CHECK, and DEFAULT.
- Domain constraints ensure the integrity of data by limiting the range of values allowed in specific columns.
Referential Integrity
- Referential integrity describes the relationships between tables through primary keys and foreign keys.
- A primary key uniquely identifies a row in a table and can be used as a foreign key in another table to link data.
- Foreign keys establish dependencies between tables, meaning that changes or deletions in one table can affect data in another table.
- Referential integrity ensures data consistency by maintaining the relationships between tables.
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Description
Explore the critical differences between data security and data integrity in databases. This quiz covers domain constraints and referential integrity, highlighting how these concepts work together to protect and verify data accuracy. Test your knowledge on the mechanisms and relationships that ensure robust database management.
