The statement that is true about R is: "Each entity in E1 is associated with exactly one entity in E2".

Here's why:

1. Since R is a many-to-one relationship from E1 to E2, this means that multiple entities in E1 can be associated with a single entity in E2, but each entity in E1 can only be associated with one entity in E2.

2. The fact that E1 and E2 participate totally in R means that every entity in both E1 and E2 is involved in at least one relationship in R.

3. The cardinality of E1 being greater than the cardinality of E2 further supports the fact that each entity in E1 is associated with exactly one entity in E2, as there are more entities in E1 to be associated with entities in E2.

Therefore, the statement "Each entity in E1 is associated with exactly one entity in E2" is true about R.

Question

The statement that is true about R is: "Each entity in E1 is associated with exactly one entity in E2".

Here's why:

1. Since R is a many-to-one relationship from E1 to E2, this means that multiple entities in E1 can be associated with a single entity in E2, but each entity in E1 can only be associated with one entity in E2.

2. The fact that E1 and E2 participate totally in R means that every entity in both E1 and E2 is involved in at least one relationship in R.

3. The cardinality of E1 being greater than the cardinality of E2 further supports the fact that each entity in E1 is associated with exactly one entity in E2, as there are more entities in E1 to be associated with entities in E2.

Therefore, the statement "Each entity in E1 is associated with exactly one entity in E2" is true about R.

Knowee AI · Accepted Answer

The statement that is true about R is: "Each entity in E1 is associated with exactly one entity in E2".

Here's why:

1. Since R is a many-to-one relationship from E1 to E2, this means that multiple entities in E1 can be associated with a single entity in E2, but each entity in E1 can only be associated with one entity in E2.

2. The fact that E1 and E2 participate totally in R means that every entity in both E1 and E2 is involved in at least one relationship in R.

3. The cardinality of E1 being greater than the cardinality of E2 further supports the fact that each entity in E1 is associated with exactly one entity in E2, as there are more entities in E1 to be associated with entities in E2.

Therefore, the statement "Each entity in E1 is associated with exactly one entity in E2" is true about R.

In an Entity-Relationship (ER) model, suppose R is a many-to-one relationship from entity set E1 to entity set E2. Assume that E1 and E2 participate totally in R and that the cardinality of E1 is greater that the cardinality of E2. Which one of the following is true about R?

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