Define three conditions under which it is appropriate to use a surrogate key in place of the primary key of a relation.

Here we explain three cases when it makes sense to use a surrogate key in lieu of the relation's main key.

3) A relation is said to be in 3NF if it is in 2NF and no nonprime attribute of R is blank the primary key. A) an alternate forB) transitively dependent on C) Part of D) partially functionally dependent onE) fully funcionally dependent on

Let R₁ and R₂ be the relations on X={a,b,c}, R₁={ (b,a), (c,b), (a,c) } R₂={ (a,c), (b,c)} R₁-¹= R₂ ° R₁=

What is the difference between a weak and 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.…

Explain the process of decomposing a relation to achieve higher normal forms and the potential trade-offs involved.

An explanation of three different scenarios in which it might be appropriate to use a surrogate key in place of the relation's primary key is provided here.

xexplanation of three situations when a surrogate key should be produced for the primary key of a relation?

explanation of three circumstances where a substitute key for a relation's primary key should be created?