What is a well-structured relation?
Q: What are three indications that a surrogate key should be constructed for the primary key of a…
A: Surrogate key is unique key and also called as synthetic primary key. Surrogate key holds anonymous…
Q: The trigger below is defined on the relation T (C, D) with the primary key on the attr
A:
Q: What are the conditions under which an attribute of a relation may have a changeable length?
A: Introduction: An attribute is defined as a trait or characteristic found in a person, a place, or an…
Q: What is Ternary Relationship?
A: Given: What is Ternary Relationship?
Q: The use of composite attributes are avoided in relation schema when the relation schema conforms to…
A: The use of composite attributes, are avoided in a relation schema when it is said to be in First…
Q: In mathematical term Table is referred as a. Relation b. Attribute c. Tuple d. Domain
A: In mathematical term Table is referred as a. Relation b. Attribute c. Tuple d. Domain
Q: A relation cannot have: Multi-values attributes Several super-keys O Composite attributes Attributes…
A: Answer:
Q: Can instances of a relation (sample data)prove the existence of a functional dependency? Why or why…
A: Lets see the solution.
Q: What problems might arise from vertically partitioning a relation?
A: Issues of vertical partitioning Vertical Partitioning: The separation of the logical_ relation…
Q: The objects in database description is called a. concept construct b. entity construct c. schema…
A: Given data is shown below: The objects in database description is calleda.concept constructb.entity…
Q: An attributes in a relation coming from another relation is called: * O foreign key fields…
A: An attributes in relation coming from another relation is called
Q: Under what circumstances can an attribute of a relation be of variable length?
A: An attribute of a relation is the characteristic which is specified in a column. A relation is a…
Q: Computer science What is the relationship between the primary key of a relation and the…
A: The Answer is in step2
Q: The following functional dependencies describe a relation that is in 2NF. Customer_ID, Store_ID→…
A: Rules of 2NF: Table must be in 1NF No non-prime attribute is dependent on the proper subset of any…
Q: It is the relation among individual entities and values. O principles patterns state relation
A: In Step 2, I have provided correct option-----
Q: Explain references the primary key in the same relation?
A: The primary key constraint is that each row in the relational database management system table is…
Q: Describe the differences in meaning between the terms relation and relation schema.
A: A relation schema is the combination of list of attributes and their related domain types. An…
Q: Computer science Explain how the primary key in the same relation is referenced.
A: Introduction: The primary key constraint requires that each row in the relational database…
Q: What is the binary relationship?
A: Binary relationship A Binary Relationship is a relationship between two different Entities which…
Q: Define the term Well-structured relation?
A: Well-structured relation • A well-structured relation is defined as the phenomenon where the…
Q: What is PrOPertieS Of relAtiOnS?
A: Given: Properties of Relation
Q: How can we define relation? Identify the characteristics that make up a relation.
A: The table in the relational database or the relationships created between the same tables using…
Q: What is a simple (or atomic) attribute?
A: The simple values are the atomic or unique values which can not be modified or altered further.
Q: creating a relation database schema
A: Below is the required relational database schema:
Q: When it comes to relationships, what is the connection between the main key of a relation and the…
A: The connection between the main key of a relation and the functional dependencies among all…
Q: Map the car sale ER schema into a relation schema. Specify all primary keys (underline) and foreign…
A:
Q: What exactly does it mean to define a relation? Determine the aspects that contribute to the…
A: Start: A connection is the same thing as a table with two dimensions. It includes a certain…
Q: A relation takes a students identification number at your college as input and outputs the students…
A: A relation takes a students identification number at your college as input and outputs the students…
Q: just answer true/false a]Disjointness means that every entity of a supertype must be an entity in…
A: As per bartleby guidelines we need to answer only the first 3 subparts in a question. a]Disjointness…
Q: List all nontrivial functional dependencies satisfied by the relation of Figure7.18.
A: Given: List all nontrivial functional dependencies satisfied by the relation of Figure7.18.
Q: When the foreign key refers to a tuple which does not exists in subjected relation then the…
A: Referential integrity constraint - If a foreign key exists in a relation, then the foreign key value…
Q: What exactly is a Ternary Relationship, and how does it function?
A: We know that the relationship of degree three is when three entities participate in an association…
Q: A relation that has no transitive dependencies is in __________ normal form.
A: Normalization in DMBS : In designing the database, there is a requirement to remove all the types…
Q: Define the term Relation?
A: Answer: A relation between two sets is a collection of ordered pairs containing one object from…
Q: Show all the steps as you perform normalization for each problem up to 3NF. State your final…
A: From looking at table values since there is transitive dependency as Emp_no determines Lcode and…
Q: The term "interpolation of attributes" is a little vague.
A: Start: Interpolation happens when you put your own point of view into a conversation between two…
Q: Three instances in which a surrogate key should be constructed for the relation's primary key
A: The following are some of the reasons for creating a surrogate key: When gathering dimensional data…
Q: Any relation that is not part of the logical model, but is made visible to a user as a a)Absolute…
A: 6.Any relation that is not part of the logical model, but is made visible to a user as a Any such…
Q: Can a key be the set of all attributes if there is at least one nontrivial FD in a schema?
A: When a relation R, having a set of attributes A1, A2, ... An and an attribute B so the any two…
Q: What happens if a super set object doesn't have a UID when using the arc implementation to turn it…
A: INTRODUCTION:
Q: What do you mean by "transitive dependency" in your definition?
A: Answer: A transitive dependency in a database is a backhanded connection between values in the very…
Q: Why is it that normalized relations do not jeopardize the efficiency of a physical implementation…
A: That normalized relations do not jeopardize the efficiency of a physical implementation structure…
Q: Define the term primary key in terms of functional dependencies
A: Functional Dependency (FD) is a constraint that determines the relation of one attribute to another…
Q: 14. A _____ is a property of the entire relation, rather than of the individual tuples in which each…
A: Python is an interpreted, object-oriented, high-level programming language with dynamic semantics.…
Q: Indicate dependences and their type.
A: There are two data dependencies: on $6 between the SW and the add, and on $1 between the SWand lw.
Q: TF (c) If a relation is not in BCNF, then it has at least three attributes in the schema.
A: If a relation is not in BCNF, then it has at least three attributes in the schema.
Q: If you assume that a relation has no duplicate data, how do you know there is always at least one…
A: We can always be sure that there is always at least one primary key. Consider the situation when…
Q: What Is a Surrogate Key Definition?
A: Let us see the definition below,
What is a well-structured relation?
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- Please also show relation schemaThe following functional dependencies describe a relation that is in 3NF.Book_ID -> Genre_ID, Genre_TypeGenre_ID -> Genre_Type True or False? Thanks.Identify the normal form it is in. Please make sure to provide explanations to support your answer. Convert it to BCNF. 1.GRADES (S#, C#, sem, year, F#, FName, Sname, Cname, grade, crHrs) a) Write down the following functional dependencies: S# --> C# --> F# --> b) Which normal form is the above relation in? c) Convert it to BCNF: 2.TEACHES (C#, sem, year, F#, Fname, Foffice) a) Write down the functional dependency for F#: F# --> b) Which normal form is the above relation in? c) Convert it to BCNF 3. R (a,b,c,d,e,f,g) Given that: d --> a e --> f,g a) Which normal form is the above relation in? b) Convert it to BCNF:
- What is the connection between the primary key of a relation and the functional relationships that exist between all of its attributes?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 onWhat are the benefits of the use of a surrogate key?