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Which of the following is not an integrity constraint?
- a)Not null
- b)Positive
- c)Unique
- d)Check ‘predicate’
Correct answer is option 'B'. Can you explain this answer?
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Which of the following is not an integrity constraint?a)Not nullb)Posi...
Integrity Constraints in Database
Integrity constraints in a database ensure the accuracy and consistency of data stored in the database. They define the rules that data must follow in order to maintain data integrity.
Types of Integrity Constraints
- Not Null: This constraint ensures that a column cannot have a NULL value. It enforces the presence of a value in the column.
- Unique: This constraint ensures that all values in a column are unique, i.e., no duplicate values are allowed.
- Check 'predicate': This constraint allows you to specify a condition that must be met for the data to be entered or updated in a table.
Explanation of Option B
- Positive: The term "positive" is not an integrity constraint in database management. It does not define any rule or condition related to data integrity. Therefore, option B is not an integrity constraint.
In conclusion, while options a), c), and d) are examples of integrity constraints that help maintain the integrity of data in a database, option b) (Positive) is not a valid integrity constraint.
Integrity constraints in a database ensure the accuracy and consistency of data stored in the database. They define the rules that data must follow in order to maintain data integrity.
Types of Integrity Constraints
- Not Null: This constraint ensures that a column cannot have a NULL value. It enforces the presence of a value in the column.
- Unique: This constraint ensures that all values in a column are unique, i.e., no duplicate values are allowed.
- Check 'predicate': This constraint allows you to specify a condition that must be met for the data to be entered or updated in a table.
Explanation of Option B
- Positive: The term "positive" is not an integrity constraint in database management. It does not define any rule or condition related to data integrity. Therefore, option B is not an integrity constraint.
In conclusion, while options a), c), and d) are examples of integrity constraints that help maintain the integrity of data in a database, option b) (Positive) is not a valid integrity constraint.
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Which of the following is not an integrity constraint?a)Not nullb)Posi...
Positive is a value and not a constraint.
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