Regular entity type is transformed to a relation.
Q: Salesforce Assignment: SOQL Create an Inline Salesforce object query language to find the Account…
A: The objective is to create an Inline Salesforce object query language to find the Account Name and…
Q: Salesforce Assignment: SOQL Create an Inline Salesforce object query language to find the Account…
A: As per the question we have to create an inline SOQL query to find the account name and contact name…
Q: Design an EER schema for a database application that you are interested in. Specify all constraints…
A: Diagram :
Q: An attribute is a descriptive property of an entity.
A: An entity is a “thing” or “object” in the real world that is distinguishable from all other objects.…
Q: Define Database in: Informal Definition: Formal Definition: Extended Definition
A: NOTE The above question belongs to Database Management System from Computer Science. Below is…
Q: An attribute is a property that describes the nature of an entity.
A: In the are actual world, an entity is a "thing" or "object" that can be distinguished from all other…
Q: If any of the following choices are applicable, please tick them. This model includes entities like…
A: Given that, the model includes entities customers, accounts, employees, checks and the…
Q: Define relation
A: The method of managing the database is recognized as database management. In order to perform…
Q: Computer Science Erd (Entity relation diagram) Make an ER diagram about an online scheduling program…
A: ERD:- The Entity Relationship Diagram is a type of structural diagram for use in the design of…
Q: design an Enhanced Entity Relationship (EER) diagram Topic: Locomotives The ERR diagram should…
A: entities of system : PaperBook, ElectronicBook, Users, borrowing_transactions Attributes of…
Q: Random Hospital Example ERD Problem Follow the Simple Procedure for ERD diagramming to design an…
A: ans given below
Q: relation's main key and its functional interactions amongst its characteristics are interconnected
A: Please find the answer below :
Q: distinguish between relationship types and relationship instances
A: Relationship type: This expresses a type of relationship that is occurring between the entities and…
Q: A tool that can help designers understand the dependencies of database structures is a
A: The Answer :
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: Computer science What is the relationship between the primary key of a relation and the…
A: The Answer is in step2
Q: 4- Add new records /tuples in a database relation Choose
A: Since , no database or table given in question, Lets take an example of relational database sql and…
Q: A_ _is a property of the entire relation, rather than of the individual tuples in which each tuple…
A: 1) A key in DBMS is an attribute or a set of attributes that help to uniquely identify a tuple (or…
Q: Description of Constraints Violations Domain Integrity Entity Integrity
A: Domain constrain : if the data type is in appropriate or the value of the attribute that doesn't…
Q: An instance of a relation A. is serializable B. is dynamic C. is static D. is never empty
A: the answer is given below:-
Q: An attribute is a property that describes an entity's nature.
A: Introduction: A "thing" or "object" that can be recognised from all other items in the real world is…
Q: How do you know whether to convert a relationship to an associative entity type?
A: These entities are used when user wants a relationship to be mixed in a relationship.For example…
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: creating a relation database schema
A: Below is the required relational database schema:
Q: What is a well-structured relation?
A: Answer: Well-structured relation Definition: A well-structured relation is defined as the…
Q: Describe the Entity-Relationship model and its role in a database.
A: In this question we have to understand Entity Relationship model in database. Lets understand the…
Q: When using the arc implementation to convert a super set entity into a relation, what if the…
A: Arc implementation is considered as supertypes/subtypes data modelling. Like for an Event, it can be…
Q: Computer Science: Why normalized relations may not impair the efficiency of a physical…
A: The answer :
Q: Explain the development of Domain Model with help of example.
A: A domain model is a graphical representation of real world ideas and not software or database.It…
Q: External Entities may be a
A: External entities is used to define and understand the sources and destinations of information…
Q: differences between is-a relationship and has-a relationship with examples.
A: There are two ways to reuse codes in object oriented programming either by the implementation of…
Q: List five properties of relations.
A: Given: five properties of relations.
Q: "SUPERMARKET STOCK CONTROL SYSTEM" It is an application made for the employees in the Super Market…
A: there are four entity employee,login,product and supplier. employee has employee…
Q: Salesforce Assignment: SOQL Create an Inline Salesforce object query language to find the Account…
A: Introduction: SOQL is the query language built by the salesforce they use this query language to…
Q: Define partial specialization rules
A: To be determine: Define partial specialization rules
Q: The "Title" attribute in "BOOK" Entity Type is considered as: Main Sub
A: Here the attribute is further divided as Main and Sub.
Q: Databases: Describe six key aspects of relations that exist in databases.
A: Given: Databases: Describe six key aspects of relations that exist in databases.
Q: Databases: Give six important properties of relations.
A: The six important properties of relations are as follows: Values are atomic. Column values are of…
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: The arrow diagrams for relations A and B are shown below. Both relations have the domain {a, b, c,…
A: Let's first write down the sets of A and B A = {(a, a), (a, c), (b, d)} B = {(a, a), (d, a), (c, d)}…
Q: entities: Residential students which fields like student id, Student name, exam papers Transfer…
A: Given entities: Residential students which fields like student id, Student name, exam papersTransfer…
Q: LOGICAL DATABASE DESIGN. The above EER-Diagram represents a Health Club Membership account…
A: Given: LOGICAL DATABASE DESIGN. The above EER-Diagram represents a Health Club Membership account…
Q: Complete the object conceptual data model for the following relational schema.
A: Let's understand some key points regarding conceptual data models. It is hardware and software…
Q: Briefly explain the hybrid entities
A: I'm providing you the answer of the above question. I hope this will help you.
Q: 103. The tuples in relation are sensitive to a. order b. format c. entity type d. concept type
A: Given that, 103. The tuples in relation are sensitive toa. orderb. formatc. entity typed. concept…
Q: transitive dependency.
A: Actually, Transitive dependency is used in database. The answer has given below:
Q: A _____ relationship exists when an association is maintained within three entities. strong…
A: Here in this question we have to find if a relation is there with three entity's.so what would we…
Q: 2- Design a class diagram of a course registration system. Note: utilize various class relations:…
A: Answer : the complete class diagram of course registration system is designed as below diagram using…
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- Computer science Explain the functional relationship between the primary key and a nonkey attribute that is accessed through another nonkey attribute.3. In mathematical term Row is referred as a. Relation b. Attribute c. Tuple d. DomainSafe Datalog Rule: A Datalog rule is of the form:p :- q1, ..., qn. where n>0 and p is a positive atomic formula and q1, ..., and qn are positive or negative atomic formulas. A positive atomic formula is of the form:r(x1, ..., xm) and a negative atomic formulas of the form:not r(x1, ..., xm) where m>0 and r is a relation name and x1 , ..., xm are either numbers or variables. Relation names and variables are made up of alphabetic letters or digits and start with a lower-case alphabetic letter. Even though the variables are made up of lower and upper-case letters, these should be considered case-insensitive. For example, cno, CNO, cNO, etc all should be treated as the same variable. Some examples of Datalog rules are given below: ancestor(x1, y1) :- parent(x1, y1). teaches(tno,cno) :- faculty(tno), course(cno), assigned(tno,cno). p(x,y) :- q(2,x), r(u,45,z), s(a,b,22). p(x,y,z) :- q(x), not r(y,20), s(x,z). A Datalog rule is considered “Safe” if all variables that appear to the left…
- Random Hospital Example 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. Random Hospital Example A hospital has 10 wards, each containing up to 20 patients. Patients have only one doctor allowed to prescribe drugs for them. Doctors do their rounds once a day and prescribe drugs by…Define relationCSC 472 Introduction to Database Systems Project Consider the contents of output tuples generated by a join operator. The advantage of "late materialization" approach is that future operators in the query plan never need to go back to the base tables to get more data. Group of answer choices True False
- Briefly discuss the properties of a relation.OO questions Create the UML diagram for the two entities( person, books). A person has borrowed some books from a library. This can be represented as one to many associations. Please implant this bidirectional association considering that there is no order of the books.Explain the development of Domain Model with help of example.
- recurrence relation recurrence relationrecurrence relationAn instance of a relation A. is serializable B. is dynamic C. is static D. is never emptyTrue or False : ___ Multiple Inheritance happens when a class has more than one sub-class. This problem can be observed in Programming Languages as well. ___ Given two relations named A and B, if we q-JOIN A and B, the maximum number of attributes in the result relation could be (the number of attributes of A) times(*) the number of attributes of B). ____ * in an SQL SELECT statement means “all the tuples”. ____ In relational algebra, Cartesian Product (X) can be implemented using the q-JOIN operator. Cartesian Product ISA q-JOIN where q-condition always evaluates to true. ____ SQL is based on Predicate Calculus. A query in SQL always specifies what should be included in the query result.