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Which type of integrity constraint ensures that the overall validity, integrity, and consistency of the data present in the database table is maintained?
Which type of integrity constraint ensures that the overall validity, integrity, and consistency of the data present in the database table is maintained?
- Referential Integrity Constraint
- Key Constraints
- Domain Integrity Constraint (correct)
- Entity Integrity Constraint
What is the purpose of integrity constraints in a Database Management System (DBMS)?
What is the purpose of integrity constraints in a Database Management System (DBMS)?
- To restrict the kind of attributes or values a column or relation can hold
- To prevent accidental damage to the database by an authorized user
- To impose rules on the table or attributes of a table
- To ensure overall validity, integrity, and consistency of the data (correct)
Which type of integrity constraint specifies that a particular column can hold null values?
Which type of integrity constraint specifies that a particular column can hold null values?
- Domain Integrity Constraint (correct)
- Referential Integrity Constraint
- Key Constraints
- Entity Integrity Constraint
What happens when an integrity constraint comes out to be False?
What happens when an integrity constraint comes out to be False?
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What is the purpose of a referential integrity constraint?
What is the purpose of a referential integrity constraint?
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Study Notes
Integrity Constraints in Database Management Systems (DBMS)
- Integrity constraints are rules that ensure data validity, integrity, and consistency in a database table. They serve to prevent invalid data entry and maintain the quality of data.
Types of Integrity Constraints
- Domain Integrity Constraint: Defines valid values for a column, ensuring data entered matches a specified format, type, or range.
- Null Integrity Constraint: Specifies whether a particular column can accept null values, helping maintain data completeness.
Consequences of Integrity Constraints
- When an integrity constraint evaluates to false, it indicates a violation of the defined rules; this could lead to rejection of the entry, error messages, or enforcement of corrective measures depending on the DBMS configuration.
Referential Integrity Constraint
- This constraint ensures relationships between tables remain consistent by enforcing that a foreign key in one table must match a primary key in another, maintaining the integrity of references across the database.
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