Question: For a binary relationship set R between entity sets A and B,the Mapping Cardinality is MANY to ONE if
Answer:
MCQ: For a binary relationship set R between entity sets A and B,the Mapping Cardinality is MANY to ONE if
Correct Answer:
A. An Entity A is associated with any number (zero or more)of entities in B,An entity in B however, can be associated with at most one entity in A.
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Related Questions
- 1. For a binary relationship set R between entity sets A and B, the Mapping Cardinality is MANY to MANY if
- 2. Which one of the following allows us to uniquely identify the entity in the entity set?
- 3. A_______is a set of one or more attributes that, taken collectively; allow us to identify uniquely an entity in the entity set.
- 4. A Super keys for which no proper subset is a super key. Such a minimal Super keys are called _______
- 5. 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.
- 6. The _______ should be chosen such that its attributes are never, or very rarely changed.
- 7. ________ is the columns of a table that points to the candidate key of another table.
- 8. The table containing the foreign key is called the child table, and the table containing the candidate key is called the referenced or parent table.
- 9. The purpose of the foreign key is to identify a particular row of ___________.
- 10. The foreign key is equal to the candidate key in some row of the primary table, or else has no value (the NULL value.). This rule is called a ______ between the two tables.
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