Explain mandatory participation in an entity relationship
Mandatory participation means that one entity occurrence requires a corresponding entity occurrence in a particular relationship. If no optionality symbol is depicted with the entity, the entity is assumed to exist in a mandatory relationship with the related entity. If the mandatory participation is depicted graphically, it is typically shown as a small hash mark across the relationship line, similar to the Crow's Foot depiction of a connectivity of 1 . The existence of a mandatory relationship indicates that the minimum cardinality is at least 1 for the mandatory entity.
You might also like to view...
Cash received in advance for performing a service or delivering a product is called unearned revenue
a. True b. False Indicate whether the statement is true or false
The descriptive measure of variability that is based on the concept of a variation about the mean is the
A. range. B. interquartile range. C. absolute value of the range. D. standard deviation.
What information does a manager need to gather for a make-or-buy decision?
The profit-volume graph shows the relationship between operating income and the number of units sold
Indicate whether the statement is true or false