Question: ______ is the restrictions imposed to maintain the data integrity of the database
Answer:
An ER enterprise schema may define certain constraints to which the contents of database must conform. Mapping cardinalities or cardinality ratio and participation constraints are two most important types of constraints
MCQ: ______ is the restrictions imposed to maintain the data integrity of the database
Explanation:
An ER enterprise schema may define certain constraints to which the contents of database must conform. Mapping cardinalities or cardinality ratio and participation constraints are two most important types of constraints
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Related Questions
- 1. For a Binary relationship set R between entity sets A and B, the ________ express the number of entities to which another entity can be associated.
- 2. For a Binary relationship set R between entity sets A and B,the ________ express the number of entities to which another entity can be associated.
- 3. For a binary relationship set R between entity sets A and B, the Mapping Cardinality is ONE TO ONE if
- 4. For a binary relationship set R between entity sets A and B,the Mapping Cardinality is ONE TO MANY if
- 5. For a binary relationship set R between entity sets A and B,the Mapping Cardinality is MANY to ONE if
- 6. For a binary relationship set R between entity sets A and B, the Mapping Cardinality is MANY to MANY if
- 7. Which one of the following allows us to uniquely identify the entity in the entity set?
- 8. A_______is a set of one or more attributes that, taken collectively; allow us to identify uniquely an entity in the entity set.
- 9. A Super keys for which no proper subset is a super key. Such a minimal Super keys are called _______
- 10. We shall use the term ________ to denote a candidate key that is chosen by the database designer as the principal means of identifying entities within in an entity set.
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