For the given schema, write relational algebra for the following queries. Student (id, name) Enrolledin (id, code) Subject (code, lecturer) 1. What are the names of students enrolled in cs3020? 2. Who teaches cs1500 or cs3020? 3. What are the names of students in cs1500 or cs3010? 4. What are the names of students in both cs1500 and cs1200? 5. Which subjects is Hector taking?

Q: Consider the database schema below for hotels in countries. A country have many hotels, and the same…

A: Lets see the solution.

Q: Write the following queries in relational algebra, using the university schema.a. Find the ID and…

A: Answer:   a.) Find the ID and name of each instructor in the Physics department.   πID, name…

Q: Given the relation schema R(A, B, C) and S(C, D, E), please match each of the following relational…

A: ANSWER:

Q: Consider the following relational schema Sailors(sid, sname, rating, age) Reserves(sid, bid, day)…

A: 1.SELECT B.bid,B.bname,B.size FROMBoats AS BJOINReserves AS RON B.bid=R.bidJOINSailors AS SON…

Q: Study the relational schema: CUST(ID, Name, ProdID) PROD(ProdID, PName, Price) Which of the…

A: option(B) is the correct option.

Q: The partitioning of a relation based on an attribute can have a considerable impact on the query…

A: Structural Query Language (SQL) refers to a database language. It is possible to work with tables…

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: Explain how referential integrity is represented in relational model?

A: Referential integrity means the values of a column in one table is referred by another column in…

Q: ver All the questions: Consider the below Student table and write the appropriate relational algebra…

A: Here we need to use selection operator to select only those tuple whose city is not equal to muscat.…

Q: Write Queries in Relational Algebra = sleer (r) = From T =where Op(7) Consider the following schema:…

A: Solution:   Given,

Q: Consider the given bank database schema given in question (2). Write a SQL trigger to carry out the…

A: The complete answer is given below with explanation.

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: Consider the two relational tables: Instructor and Teaches, given in the next page to answer the…

A: In the 1st question, you have to perform the Natural Join.  Natural Join - It is the simplest join…

Q: Given the following Theatre Database form:    No.of seats:500                          Owner:…

A: Normalization of data is method which is used to organize the data in the database and it applies a…

Q: model

A: Relation schema is used to visualize the design and structure of the relation like it consists of…

Q: Transform the diagram to a relational schema that shows referential integrity constraints

A: Relational schema: ERDPlus permits drawing customary relative Schema parts Tables (Relations) Table…

Q: Employee: (EID, Name, City, Address) Department: (DID, Department_Name, City, budget) Works IN:…

A: All the above details that are mentioned above in the question we will take to solve the question:…

Q: Explain with an appropriate example in the relational model.

A: Introduction: A relational model is a database that stores and makes available connected data…

Q: For the above given database schema you are required to develop a SQL query for the creation of the…

A: Required:   We have to develop Sql queries according to the given database schema.

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: Consider the relational database of Figure 3.19, where the primary keys areunderlined. Give an…

A: Creating the table – CREATE TABLE works(ID number, works_name text, salary number);   Inserting the…

Q: Question 9: The maximum number of superkeys for the relation schema R(E,F,G,H) with E as the key is…

A: The maximum number of superkeys for the relation schema R(E,F,G,H) with E as the key is 8. Option 4…

Q: Specify

A: Here are the SQL queries as asked:   1. List the department managers who are controlling more than 2…

Q: Refer the below listed schema diagram to develop the SQL query to display the names of all students…

A: Sql query to display the names of all students who have secured more than 50 in all subjects that…

Q: Given the database schema R(A, B, C), and a relation r on the schema R, write an SQL query to test…

A: Functional dependency An attribute C does have a functional dependency on valid instances of…

Q: QUESTION 4 Answer All the questions: Consider the below Student table and write the appropriate…

A: Given : Here, we have given the Student table with the list of columns. We need to write the…

Q: BOOK Book_id Title Publisher_name BOOK AUTHORS Book_id Author_name PUBLISHER Name Address Phone…

A: Objective: The relations for the library database are provided specifying the key attributes, i.e.…

Q: SQL allows relations with duplicates (Chapter 3), and the multiset version of the relational algebra…

A: Validation:   All the equivalence rules 1 through 7.b of the section 16.2.1 will hold for the…

Q: Consider the following schema for STUDENT- Student (RollNo, Name, City, Father-Name, Branch, Sem,…

A: According to our guidelines we solve first 3:…

Q: Write the following queries in SQL on the relational database schema for COMPANY database given in…

A: As per company rules we are only supposed to answer first question in case of multiple questions.…

Q: Consider the employee database of Figure 3.19. Give an expression in SQL foreach of the following…

A: Inserting some record values in the works table, after insertion the works table will apear as given…

Q: Using the air flights schema given in question 5, write the queries for the given relational algebra…

A: As the flights schema is not given, the query for relational algebra expression is written with…

Q: Question 5 Given the relation schema R(A, B, C) and S(C, D, E), please match each of the following…

A: 1) Symbol for UNION operation is : U

Q: Question#2: Given the following Theatre Database form:    No.of seats:500…

A: The answer is

Q: Given the relation schema R(A, B, C) and S(C, D, E), please match each of the following relational…

A: 1-G 1. R U  S === G. (From the given quetion) SELECT * FROM R UNION SELECT * FROM S;

Q: For a relational schema R(ABCDEFG), Following dependencies are given to you i)Find out the prime…

A: For a relational schema R(ABCDEFG), Following dependencies are given to you The answer has given…

Q: Write the following queries in SQL on the relational database schema for COMPANY database given in…

A: Answer: select sum(Hours) from WORKS_ON group by Essn having Essn = (select Mgr_ssn from…

Q: Consider the 2 tables TI and T2 shown in Figure. Show the results of the subsequent operations with…

A: Relational algebra is a procedural query language that takes relational inputs and gives relations…

Q: Based on the following table given , a)Write a 1NF relational schema and identify the partial and…

A: Dear Student, In this question primary key is marked with a underline and foreign key is written as…

Q: Using the relational database given in lab work no. 2, write the following queries in SQL: 1) Which…

A: Structured Query Language(SQL) A very-high-level language, in which the programmer is able to avoid…

Q: Given the relation schema R(A, B, C) and S(C, D, E), please match each of the following relational…

A: Union Operator (∪) is used to find the union of two relational schemas. The result will include the…

Q: Answer All the questions: Consider the below Student table and write the appropriate relational…

A: The answer is given in step 2.

Q: Given the relation schema R(A, B, C) and S(C, D, E). please match each of the following relational…

A: ANSWER: 1 -> G 2 -> H 3 -> A 4 -> B 5 -> not applicable any option. But the only…

Q: translate the following ER diagram into the appropriate relational schema(s):

A: ER diagram: ER stands for Entity Relationship. It looks like a flowchart. It is used to illustrates…

Q: 4. Find the sids of suppliers who supply every part.   please only answer point number 4

A: Suppliers (sid, sname, city) Parts (pid, pname, color) Catalog (sid, pid, price)

Q: Consider the library database of Figure 3.20. Write the following queries in SQL.Find the average…

A: Explanation: The below query is used to print the average number of books borrowed by the…

Q: Consider the relational database of Figure 3.19, where the primary keys are underlined. Give an…

A: Query: The structured language query to find the ID, name, and city of residence of each employee…

Q: Consider the following database and its schema and write relational algebra expression to retrieve:…

A: We need to write relational algebra expression which will display name of branch located in Abha i.e…

Q: Table: Student Table: Participate Table: Course studentld address studentld courseld courseld…

A: There are five relational tables in the given database. These tables are as follows. 1) Student 2)…