Question

2.11 ______express the number of entities to which another entity can be associated via a relationship set.
2.12 Weak entity set is represented as _______
2.13 _________uniquely identifies the elements in the relation.
2.14 An entity in A is associated with at most one entity in B, and an entity in B is associated with at most one entity in A. This type of relationship is called __________
2.15 Aggregate functions are functions that take a______ as input and return a single value​

Answer 1

Answer:

2.11) Mapping cardinality

2.12) Double rectangle

2.13) Primary key

2.14) One to one

2.15) Calculation