Write Queries in Relational Algebra = sleer (r) = From T =where Op(7) Consider the following schema: Showroom (ShowroomID: integer, ShowroomNAME: string, ShowroomADD: string) Car (CarID: integer, CarNAME: string, CarMAKE: string, Year: date, CarCOLOR: string) Order (ShowroomID: integer, CarID: integer, cost: real) The underlined attributes are keys for their corresponding tables in the above schema. Note that the relation Order is a mapping between two other relations. Write the following queries in relational algebra

Q: Define Completeness constraint?

A: The answer is given below:

Q: Consider a database that consists of the following relations. SUPpLIER(Sno. Sname) PART(Pno, Pname)…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: R1 be ce do 1에 21 3-. 2 4 700 RO a어 b c에. 1어 2- 2. 2어 1에 2-. 31 1에 2-.+ 4. For each of the following…

A: 4. a. R0 ⋈ R1 We can perform a Natural Join only if there is at least one common attribute that…

Q: Solve only 1,2,3 please fast.       Consider the following scheme   Supplier (sid, Sname,…

A: Solution :

Q: QUESTION 3 Consider the following database schema for a library. Book (BookID:int,…

A: Foreign key :- A foreign key is a set of attributes in a table that refers to the primary key of…

Q: Create a complete ERD in Crow's Foot notation that can be implemented in the relational model using…

A: Answer

Q: If P is the primary key of schema R, we must have P -> R. True or

A: If P is the primary key of schema R, we must have P -> R. --> True

Q: Consider the relations Courses1, Courses2, Enrollment and Students. Courses cid ename Al Calculus A2…

A: As per the answering guidelines solving the first 3 sub question completely.  1)  Here selection…

Q: Consider the following SQL query on the university schema:          select avg(salary)-(sum(salary)…

A: For numeric values it will always be zero. But when there is a null value the answer will be…

Q: Let R and S be two relations with the following schema: R (P.Q. R1, R2, R3) S (P.Q S1, S2) Where (P,…

A: Let R and S be two relations with the following schema R(P,Q−−−−,R1,R2,R3)R(P,Q_,R1,R2,R3)…

Q: Assume we have two relations R(A, B) and S(B, C). Assume that R = {(1, 2),(2, 3),(3, 4)}, and S =…

A: Answer:-

Q: Given relations P and Q, both over attributes A and B, write a query in relational algebra under bag…

A: Q is always contained in the answer to P.

Q: MPLOYEE FNAME MINIT LNAME SSN BDATE ADDRESS SEX SALARY DNO DEPARTMENT DNAME DNUMBER MGRSSN…

A:

Q: Create a complete ERD in Crow’s Foot notation that can be implemented in the relational model using…

A: In the crow’s foot notation, entities are displayed in a box with the attributes listed below the…

Q: Let R(a, b, c), S(a, b, c), and T(a, b, c) be three relations. Write one or more Datalog rules that…

A: Let R(a, b, c), S(a, b, c), and T(a, b, c) be three relations. Write one or more Datalog rules that…

Q: QUESTION 6 Consider the following database schema for a library. Book (BooklD:int,…

A: The answer is True.

Q: Part 2: Use the following relations to answer question 4. RO R1 a b b 2 3 4 7 1 2 2 1 2 1 2 3 1 2 4.…

A: a) is join  b) Projection give attributes and union give without duplicates .

Q: Suppose you have a relation containing x, y coordinates and names of restaurants. Suppose also that…

A: Consider the names of the restaurant with x and y coordinates that have a relation to answer the…

Q: Multiple Inheritance happens when a class has more than one sub-class. This problem can be observed…

A: Solution :  The answer is False

Q: Solve only 4,5,6 . Please fast.   Consider the following scheme Supplier (sid, Sname, rating)…

A: Solution :  Given  Supplier (sid, Sname, rating) Parts (Pid, pname, color) Catalog (sid. Pid, cost)…

Q: Q7. Consider a database containing two relations: R(A,B,C) and S(D,E,F). For each of three (your…

A: Answer:-

Q: Create an ERD in Crow's Foot or UML notation that can be implemented in the relational model using…

A:

Q: Let R(A, B, C, D, E, F) be a relation with FD's: {D → C, C → D, D → E, C → E, E → AD, AF → E, D →…

A: Let R(A,B,C,D,E,F) be a relation with FD's  :…

Q: database Assume that you have the following relation; R(a,b,c) a   b  c ---------- 1  A   F 2…

A: Given: database Assume that you have the following relation; R(a,b,c) a   b  c ---------- 1  A   F…

Q: For the following database scheme Employee(empNo, fName,IName,address,DOB,sex,position.deptNo)…

A: The following Relational Algebra produces the list of names of all employees who work on the SCCS…

Q: For each of the following pairs of expressions, give instances of relations thatshow the expressions…

A: Equivalence relation An equivalence relation on a set S is defined as a relation on S which holds…

Q: Consider the following prolog database: married (logan, marcia), parent (logan, connor), parent…

A: ?- trace. true. [trace] ?- sibling(rosa, julia). Call: (8) sibling(rosa, julia) ? creep…

Q: Consider the following database schema for a library. Book (BookID:int, BookTitle:string(unique),…

A: No, It Is Not Possible to have a Borrowing-Record with an unknown CustomerCPR.

Q: Write a relational algebra expression that is equivalent to the following SQL statement: SELECT…

A: Given SQL statement is, SELECT AVG(SALARY) , COUNT(*) FROM EMPLOYEE WHERE  GENDER = 'M' GROUP BY…

Q: Q1. (Extended Relational Algebra): Here are two relations: R(A,B): {(0,1),(2,3),(5,2)}, S(B,C):…

A: Solution for above question is given below -

Q: PLEASE TYPE IF NOT TYPE THAN DO NOT DO IT*** DO ALL 3 (B VIA D)**** Exercise 8.4.1: Composition of…

A: Given :     Here are two relations defined on the set {a,b,c,d} S={(a,b),(a,c),(c,d),(c,a)}…

Q: Consider the relational schema for a library system as given below: Member (mem _no, name, dob)…

A: Answer i)- select * from Member m where m.mem_no not in(select b.mem_no from Borrowed b);     Answer…

Q: Consider the following database schema for a library. Book (BookID:int, BookTitle:string(unique),…

A: CPR is the type of int

Q: Defined the relational algebra operations as follows: SELECT (p, R) is equivalent to σp(R)…

A: we have to write a SQL statement for the given relational algebra. PROJECT (<STUD_ID,…

Q: Let R(a,b,c), S(a,b,c), and T(a,b,c) be three relations. Write one or more Datalog rules that define…

A: Note- as per bartleby guidelines only one question's answer can  be given at time. Kindly find below…

Q: 2. Consider the following schema: Books (book_id, title, year, pub_id, auth_id, price)…

A: Note : As per guidelines of the company, we are authorized to answer 3 sub parts of a question. Thus…

Q: TRUE OR FALSE In the Relational Data Model, Referential Integrity Constraint is a special kind/case…

A: Solution: In the Relational Data Model, Referential Integrity Constraint is a special kind/case of…

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: If v is a scalar and R is a relation, which statement holds? Select one:

A: Lets see the solution.

Q: Exercise 2.7 Show that every instance of the schema Ø v (Y^2)] → [Ov y) ^ (Ø v x)] is PL-valid.

A: PL(propositional logic):It states whether the statement is true or false. valid means true.

Q: Given the business rule "An employee may have many degrees." Suppose that an employee has the…

A: EXPLANATION Below is the answer for the given question. Hope you understand it well. If you have any…

Q: CSC 472 Introduction to Database Systems Project Consider the contents of output tuples generated…

A: The above question is solved in step 2:- This is a development(optimization) feature found in…

Q: Write the following queries in relational algebra Customer (sid, name, career) Commodity(cid,…

A: Objective: Given three table schema  Customer (sid, name, career) Commodity(cid, title) Price (sid,…

Q: Consider the following database in Prolog: birthday(tom). birthday(fred). birthday(helen),…

A: Here I explained Prolog code with proper output. I hope you like it. Use Swish Online Prolog…

Q: Write the SQL trigger for 5.7 in the back of Ch.5 ………………………..   Consider the bank database of Fig.…

A: EXPLANATION: The create trigger command is used to create a trigger with the specified name that…

Q: Given the databaseeat(bear, fish)eat(bear, fox)eat(deer,…

A: The database for the above instructions in Prolog is made as: eat(bear, fish).eat(bear,…

Q: For the following Student table, find all the possible functional dependencies that are he ld.…

A: For the following Student table, find all the possible functional dependencies that arehe ld.Schema:…

Q: Consider the following ERD; consider additional attributes if needed Write relational algebra…

A: Here i write relational algebra query for all :…

Q: Suppose you are given a relation grade_points(grade, points) that provides a conversion from letter…

A: Search the student's total grades of ID 12345, All of the student's courses. Choose sum (* points)…

Intermediate SQL Concepts

A query is a request for data or information from one or more database tables. This information could be presented in the form of pictorials, graphs, or complicated findings which helps in easy interpretation. Structured Query Language (SQL) is the most widely used programming language for retrieving and organizing data from relational databases. Collection of tables with rows and columns is referred to as a database. SQL is the language of databases. It makes it easier to extract specific data from databases, which can then be used for analysis.