If we have a set of attributes as R : (A, B, C, D) and functional dependencies are: A -> B B -> C C -> A  What are the candidate key(s)?

A well-structured database starts from an effective Entity Relationship Diagram (ERD). For this part of the question, you will need to sketch an ERD for the following gym scenario: A member must have a member ID, name and contact number, can be enrolled in one or more gym session. A gym session can be enrolled in by one or more members. Each gym session is identified by a session ID, and has a name, date and instructor details (Instructor ID). An instructor has an instructor ID, name and contact number, and must only be assigned to one gym session. A gym session can have one or more instructors assigned in it.” *show entities, relationship types and cardinalities. Crow’s foot model notations recommended.

It is possible to have both a primary key and a candidate key for the same attribute.

A client wishes to retrieve some domain object, say dom, from the database. Describe a possible problem with this scenario. Extend your design and provide a dynamic design model (focusing on the passage of time) that can solve the problem. Note: Do not provide any statements to describe the solution. The solution should be apparent in your design. Non-functional requirements include integrity of data and resource utilization.

For the same feature, it is feasible to have both a primary key and a candidate key.

Consider the relation R(A, B, C, D, E), where it is known that the only keys are KA, C, D} and {D, E}: Give a set of functional dependencies that will make {A, C, D} and (D, E} be the only keys of R. This set should be such that if you delete any of the functional dependencies, then the keys of R will be something other than {A, C, D} and {D, E}.

Explain the difference between a candidatekey and the identifier of an entity type.

How to convert a weak entity set into a strong entity set?

Swing Jazz Club ERD Problem Follow the Simple Procedure for ERD diagramming to design an ERD using the following user provided information.   Remember the ERD will eventually turn into the design for a database from a top down view.  Make sure you resolve any many to many conflicts.  Label an identifier or primary key and all pertinent attributes given.   If an attribute is not readily apparent from the user information, then make one up that makes sense for the particular entity.  Therefore, all entities should end up with at least an identifier and another attribute that makes sense.  You may use any of the approaches shown by the book, though the ER-Model and Crow’s foot are the most common.  Make sure you show entities, relationships, cardinality, and optionality.  Swing Jazz Club The Swing Jazz Club teaches swing and jazz dancing and offers both private and group lessons.  Swing Jazz charges $60 dollars per hour for a private lesson and $10 dollars per hour for a group lesson.…

A relation r(A, B, C) had multi-valued dependencies among all its attributes. It was decomposed for achieving a better database as follows r1(A, B) r2(B, C) r3(C, A) This is an example of what kind of normalization? BCNF 4NF OPJNF DKN