Examlex
The entity supertype contains common characteristics, and the entity subtypes each contain their own unique characteristics.
Common Cold
A viral infectious disease of the upper respiratory tract, characterized by symptoms like coughing, sore throat, and runny nose.
Stressful Experiences
Situations or events that cause a state of strain or tension, potentially leading to negative health outcomes if not managed properly.
Contagious Microbe
A type of microorganism that can be transmitted from one individual to another, causing infectious diseases.
Psychological Factors
Aspects of a person's psychological makeup, including attitudes, emotions, and mental health, that can affect their physical well-being and behavior.
Q2: A composite identifier is a primary key
Q27: Referential _ dictates that the foreign key
Q36: Uniqueness ensures that no equal time stamp
Q39: To reveal meaning, information requires _.
Q44: The property of a subtype discriminator enables
Q47: Today, most relational database products can be
Q51: The proposed system is subject to limits
Q51: The B-tree index is used mainly in
Q66: In the relational model, _ are important
Q69: How many rows would be returned from