Explain what each of the following are: Natural Keys Composite Primary Keys Surrogate Primary Keys

Q: What would happen if database referential integrity was not enforced? What are the most probable…

A: GIVEN: What would happen if database referential integrity was not enforced? What are the most…

Q: a. Identify the business rules (types of relationships) represented in the following ERD. b. Convert…

A: Given Entity relationship diagram contains five entities that are Customer, Invoice, Line, Product…

Q: How can the multivalued attributes eliminate?

A: Suppose we have an entity Employee with the following attribute.  Employee (Eid, Name, {Address},…

Q: Convert the following ER diagram into a relational database schema, be certain to indicate primary…

A:

Q: 9. How many types of keys in Database Design? a. Candidate key b. Primary key c. Foreign key d. All…

A: There are Seven Types of Database design keys, they are Super, Primary, Candidate, Alternate,…

Q: What exactly is the significance of employing keys?

A: Introduction: A key employee has significant ownership and/or decision-making authority within the…

Q: 3. Identify the Super key, Candidate key, Primary key, Foreign Key in the below relation.…

A: Super Key: T_ID, Name, {T_ID, Name}, {T_ID, Department}, {T_ID, Course_Code#}, {Name, Department},…

Q: Question#3 Consider the following relations for a database that keeps track of items supplied by…

A: We are given two database tables: Vendor and Item and we are asked about the Degree, cardinality,…

Q: d? What are the

A: Introduction:Referential integrity refers to the relationship between tables. Because each table in…

Q: QUESTION 22 When identifying functional dependencies, the sequence/ordering of columns in a database…

A: Answer question 22 is given below

Q: QUESTION 1 Which table in the following digram will gain a foreign key after the conversion from the…

A: Dear Student, In one to many case the side of one is the side which will have a foreign key and the…

Q: Give an example of a surrogate key

A: In database design, it is a good practice to have a primary key for each table. There are two ways…

Q: Student(studentNumber, StudentName, studentAddress) Book(bookNumber, bookTitle, #authorNumber,…

A: The relational algebra for the given query is as follows,

Q: is database security? Elaborate administrative procedure that concerned with physical control of the…

A: A Database Administrator (DBA) is individual or person responsible for controlling, maintenance,…

Q: Q.3.1 Identify the type of key represented by Attraction ID in table Attraction. Explain how it was…

A: Note : please repost question 4. Only one question allowed as per guidelines. A table is a structure…

Q: 32 of 40 Suppose attribute A is a key in the relation R. Which of the following statements is not…

A: Attribute A is a key in given relation R. And we have to check, which statement is not correct in…

Q: (4) Consider the following two relations in a database: CUSTOMERS: customer_id last_name first_name…

A: Answer: Answer a: customer_id order_id order_date 4000 4 2016/04/20 5000 2 2016/04/18 7000…

Q: Give an example and an explanation of the phrase "foreign key"

A: Foreign key - It is used to join or make relationship between two tables using primary key. primary…

Q: . A relational database developer refers to a record as a. a criteria b. a relation c. a tuple d. an…

A: c) a tuple

Q: 1. What will be the tables with values to show many to many relation of this database? Typeio…

A: Below is the answer with explanation:

Q: Answer the following for the business rule. "Each player may play on more than one team, and each…

A: We need to answer the questions based on database.

Q: How multiple Primary Keys and / or Multiple Foreign Keys are created ERD. Explain with help of…

A: Given. How multiple primary keys and for multiple foreign keys are created ERD. EXPLAIN WITH HELP OF…

Q: Consider the following ERD. Draw the Logical schema for the ERD. Underline the primary keys. (IName…

A: The Answer is

Q: 12. Given the tables and noted information, what is the column dorm considered in the Housing table?…

A: The given Student table has the following relational schema  Student (StudentID, name, phone, dorm)…

Q: hat is the candidate key of this relation?

A: Database Systems Question 5. A relation R is given which is R(A,B,C,D,E). It has the following…

Q: What’s the Definition of a Surrogate Key?

A: Answer is in step 2

Q: Convert the following ER model to relational Model S ss SID S Name Avg Grade D ID D Name OLocations…

A: The answer given as below:

Q: specify the primary key(or keys) and the foreign key (or keys) in each relation. I table does not…

A: A library management system is software that is designed to manage all the…

Q: Normalization is a process of organizing the data in the database to avoid data redundancy,…

A: Normalization: it is the process of data organization in the data base to avoid redundancy in data.…

Q: The following figure present BANK ER diagram. Map it into a full relational schema. Specify all…

A: Step 1: Mapping of regular Entity Types For each regular entity type E in the ER diagram, create  a…

Q: a. Identify the business rules (types of relationships) represented in the following ERD. b. Convert…

A: Given the ERDs of student, course and professor database and also ERD of customer and order.  From…

Q: Consider the following two relational database tables to answer all the below questions. Smart Phone…

A: ANSWER 1: Primary Key for Smart Phone table: Phone_ID Foreign Key for Smart Phone table: NONE…

Q: Convert the following ER diagram into a relational database schema, be certain to indicate primary…

A: Answer : The Relational  model  of the above scenario is as shown in below :

Q: In a database, what is an unnormalized relation? Is it a connection in the conventional sense of the…

A: Given that 'In a database, what is an unnormalized relation? Is it a connection in the conventional…

Q: When people talk about "entity and referential integrity," do they mean that a database has both?

A: Introduction: The purpose is to find database issues caused by referential integrity issues. If we…

Q: What would happen if database referential integrity was violated? What are the most common errors?

A: If referential integrity was violated then join operation on the tables will fail to execute…

Q: What would happen if database referential integrity was not enforced? What are the most probable…

A: GIVEN: What would happen if database referential integrity was not enforced? What are the most…

Q: n to indicate primary keys and referential integrity constraints.

A:

Q: Consider the following relation which has been designed to store data about medical doctors,…

A: Assumptions The patient is given an appointment with doctor The patient always visits same clinic.…

Q: Give two examples of each from daily life through relational schema: a. Primary key b. Foreign key…

A: Primary Key:-   A primary key is an attribute that exists in a table or is created by the database…

Q: Explain how primary keys may be used to eliminate key ripple effects as a database grows.

A: SQL server requires a primary key not only for replication, Change Data Capture, filetables, audit…

Q: (4) Consider the following two relations in a database: CUSTOMERS: customer_id last_name first_name…

A: SQL is a language for interacting with databases. It is the basic language for relational database…

Q: Convert the following ER diagram into a relational database schema, be certain to indicate primary…

A: The main entities of the given ER diagram are: LOT ProductionUnit RawMaterials Hence the…

Q: Discuss each of the following terms:  1.database application program  2.data independence 3.security

A: 1. database application program  A web application is a computer program whose main purpose is to…

Q: 4) List all candidate keys of the books relation. 5) List all of the candidate keys of the…

A: In case of multiple questions, we are only needed to answer first question. Саndidаte  Key  –  is  а…

Q: Computer science Explain why an index is useful only if there is sufficient variety in the values of…

A: Introduction: Basically ,Indexes are special lookup tables that can be used by the database search…

Q: Consider the following relations: Students(snum: string, sname:string, major:string, level:string,…

A: a. SELECT sname FROM Student s INNER JOIN Enrolled e ON e.snum=s.snum INNER JOIN Class c ON c.name =…

Procedures in SQL

A pre-compiled stored procedure is a logical unit made up of one/more SQL statements (SQL stands for Structured Query Language). The database server saves it as an object. An SQL procedure is a collection of SQL statements and logic that is written and saved to accomplish a specified goal. An SQL procedure consists of a name, a parameter list, and a set of Transact-SQL statements. Stored procedures are stored as named objects in SQL Database Server.