What is the relational algebra expression for the following SQL statement? Retrieve all the video tapes that...
What is the relational algebra expression for the following SQL statement? Retrieve all the video tapes that have been rented by the customers with ID 101 and 106
Homework Answers
select video_tapes from customers where customers.ID =101 or customers.ID= 106;
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What is the relational algebra expression for the following SQL
statement? Retrieve all the video tapes that...
Transcribe the following SQL queries into an equivalent relational algebra expression. 1. SELECT s_number , AVG(...
Transcribe the following SQL queries into an equivalent relational algebra expression. 1. SELECT s_number , AVG( grade ) FROM grades GROUP BY s_number HAVING AVG( grade ) > 5 . 5 ; 2. SELECT SUM( volume ) FROM fertilizer_applications LEFT JOIN crop_field ON fertilizer_applications . crop_field_id = crop_field . id GROUP BY field_number HAVING field_number = 3 ;
This is Relational Algebra NOT SQL!!! I need the following 3 queries written in relational algebra....
This is Relational Algebra NOT SQL!!! I need the following 3 queries written in relational algebra. Retrieve the title of all the Movies in Japanese that don't have any comment. (The language_id for Japanese is 3) Find all the movie titles where an actor called “TOM” OR an actor called “BEN" acted, AND there was another actor called “MARY” acting too. Find the actors that have movies in all the categories. (category IDs are numbered 1-16) actor actor_id number first_name...
Based on the schemas given below, give the appropriate “SQL” and “Relational algebra” statements for the...
Based on the schemas given below, give the appropriate “SQL” and “Relational algebra” statements for the given queries Marking scheme: 1 mark for each correct syntax for SQL and Relational Algebra Employee (fname, Iname, ssn, sex, salary, dno) Department (dname, dno, managersn, dlocation) Project (pname, pno, plocation, dno) a) Find out which department “Evelyn" is working in. b) Retrieve the names of all the projects which are located in “Isa Town". c) Count the number of employees who receive a...
Relational algebra and SQL We consider the following relation Stock. The primary key of Stock is...
Relational algebra and SQL We consider the following relation Stock. The primary key of Stock is prodid, depid. prodid depid prodname quantity p1 d1 vcr 10 p1 d2 vcr 20 p2 d3 tv 30 What are the ids of the depots? (Relational algebra) What are the products (ids) in stock (quantity > 0) ? (Relational algebra)
How to convert this relational algebra statement into SQL (f) 11 pueetName, hotatNo(Booking p king BookinQuetuo...
How to convert this relational algebra statement into SQL
(f) 11 pueetName, hotatNo(Booking p king BookinQuetuo Guest) dy Lon(Hl) ote
Express the following SQL queries in relational algebra: 2) What are the singers who have never...
Express the following SQL queries in relational algebra: 2) What are the singers who have never scheduled the concert at Saint-Denis 2? SELECT singer FROM Show WHERE singer NOT IN (SELECT singer FROM Show S, Hall H WHERE S.hall_id = H.hall_id AND H.name = 'Saint-Denis 2')
Express the following SQL queries in relational algebra: 1) What are the dates of the concert...
Express the following SQL queries in relational algebra: 1) What are the dates of the concert of Lionel Richie at the Bell Center? SELECT date FROM Concert C, Show S, Hall H WHERE C.show_id = S.show_id AND S.hall_id = H.hall_id AND S.singer = 'Lionel Richie' AND H.name = ‘Bell Center’
1- Consider the following SQL query and related relations SELECT P.Name FROM Players P, Games G...
1- Consider the following SQL query and related relations SELECT P.Name FROM Players P, Games G WHERE P.Id = G.PlayerId AND P.Game = 'Football' AND G.Season ='2019' where: Players (Id, Name, Game) Games (PlayerId, GameCode, Season) A- Translate the above SQL query to a relational algebra expression. B- Draw the Query tree for above relational algebra expression in part (a). Note: Please no screenshot
5.10 Express each of the following queries in relational algebra and (ii) SQL using the Student...
5.10 Express each of the following queries in relational algebra and (ii) SQL using the Student Registration System schema of Figure 3.4. a. List all courses that are taught by professors who belong to the EE or MGT departments. Exercises 189 b. List the names of all students who took courses both in spring 1997 and fall 1998 38 CHAPTER 3 The Relational Data Model FIGURE 3.4 Fragment of the Student Registration database schema STUDENT (Id:INTEGER, Name:STRING, Address:STRING, Statu PROFESSOR...
Intro to database systems: Q7. Formulate the following SQL query in relational algebra using an efficient...
Intro to database systems: Q7. Formulate the following SQL query in relational algebra using an efficient way. The schema is given in the following. Emp(eno, ename, title, city) Proj(pno, pname, budget, city) Works(eno, pno, since) SELECT ename FROM Works , Emp WHERE Works.pno = ‘P150’ AND Works.eno = Emp.eno
Based on the schemas given below, give the appropriate “SQL” and “Relational algebra” statements for the given queries Marking scheme: 1 mark for each correct syntax for SQL and Relational Algebra Employee (fname, Iname, ssn, sex, salary, dno) Department (dname, dno, managersn, dlocation) Project (pname, pno, plocation, dno) a) Find out which department “Evelyn" is working in. b) Retrieve the names of all the projects which are located in “Isa Town". c) Count the number of employees who receive a...
How to convert this relational algebra statement into SQL
(f) 11 pueetName, hotatNo(Booking p king BookinQuetuo Guest) dy Lon(Hl) ote
5.10 Express each of the following queries in relational algebra and (ii) SQL using the Student Registration System schema of Figure 3.4. a. List all courses that are taught by professors who belong to the EE or MGT departments. Exercises 189 b. List the names of all students who took courses both in spring 1997 and fall 1998 38 CHAPTER 3 The Relational Data Model FIGURE 3.4 Fragment of the Student Registration database schema STUDENT (Id:INTEGER, Name:STRING, Address:STRING, Statu PROFESSOR...
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