Given database schema below, specify the following queries using relational algebra: TEACHER ID Name Degree Specialty...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Given database schema below, specify the following queries using relational algebra: TEACHER ID Name Degree Specialty Phone Street Add_num ZIP TEAM ASSIGNEDTO TID TNumber TNumber LeaderlD COURSE letter Level Name Tnumber PROJECT PNumber Name Topic Duration CLetter CLevel 1. Retrieve the name and ID of all "PhD" Teacher. 2. Retrieve the name of teachers who teache "Security" course. 3. For each leader find the name and the total numbers of teams that they lead. 4. Retrieve the name of courses that do not have any project. 5. Retrieve the number of projects for each course. 6. List the name and ID of the teachers, and the team number that they lead. 7. Retrieve the team number that contains all teacher. 8. Find the names of teachers that are lead by 'Sara Abdulaziz'. 9. Retrieve the team number that have the maximum number of teachers. 10. List the details of all teacher and include the team number that lead if any. 11. Retrieve the ID of all teachers either work in a team or lead a team Given database schema below, specify the following queries using relational algebra: TEACHER ID Name Degree Specialty Phone Street Add_num ZIP TEAM ASSIGNEDTO TID TNumber TNumber LeaderlD COURSE letter Level Name Tnumber PROJECT PNumber Name Topic Duration CLetter CLevel 1. Retrieve the name and ID of all "PhD" Teacher. 2. Retrieve the name of teachers who teache "Security" course. 3. For each leader find the name and the total numbers of teams that they lead. 4. Retrieve the name of courses that do not have any project. 5. Retrieve the number of projects for each course. 6. List the name and ID of the teachers, and the team number that they lead. 7. Retrieve the team number that contains all teacher. 8. Find the names of teachers that are lead by 'Sara Abdulaziz'. 9. Retrieve the team number that have the maximum number of teachers. 10. List the details of all teacher and include the team number that lead if any. 11. Retrieve the ID of all teachers either work in a team or lead a team
Expert Answer:
Answer rating: 100% (QA)
1 select name id from teacher where degreePhD 2 select name from teacher where teacherid in select l... View the full answer
Related Book For
Fundamentals of Database Systems
ISBN: 978-0136086208
6th edition
Authors: Ramez Elmasri, Shamkant Navathe
Posted Date:
Students also viewed these databases questions
-
Specify the following queries on the COMPANY relational database schema shown in Figure 3.5, using the relational operators discussed in this chapter. Also show the result of each query as it would...
-
Specify the following queries in SQL on the database schema of Figure 1.2. (a) Retrieve the names of all senior students majoring in 'COSC' (computer science). (b) Retrieve the names of all courses...
-
Specify the following queries in SQL on the database schema of Figure 1.2. (a) Retrieve the names and major departments of all straight-A students (students who have a grade of A in all their...
-
Rachael Ray Corporation had the following transactions. 1. Sold land (cost $12,000) for $15,000. 2. Issued common stock for $20,000. 3. Recorded depreciation of $17,000. 4. Paid salaries of $9,000....
-
A set of n = 30 components arc tested and their average lifetime is = 132.4 hours. (a) If the lifetimes are modeled with an exponential distribution, construct a 99% confidence interval for the mean...
-
A series of experiments were conducted by passing 40°C air over a long 25 mm diameter cylinder with an embedded electrical heater. The objective of these experiments was to determine the power...
-
Texas Inpatient Consultants, LLLP, is a partnership that employs physicians to deliver medical care to hospitalized patients of other physicians. Texas Inpatient recruited Julius Tabe, M.D., to work...
-
Blythe Industries Inc. expects to maintain the same inventories at the end of 2012 as at the beginning of the year. The total of all production costs for the year is therefore as, summed to be equal...
-
discuss the advantages and disadvantages of Database Management Systems (DBSMs). What do you personally think of Database Management Systems?
-
On July 31, 2019, Ping Company purchased 90% of Santos Company?s common stock for $2,010,000 cash. Immediately after the acquisition, the two companies? balance sheets were as follows: Santos Company...
-
What are some of the ways to establish an innovative organisational culture? What are the components that make up a strategic business plan?
-
How do I calculate loss carryforward deduction in a partnership?
-
WI has the following capital components and costs. Component Value After-tax Cost Debt 15,500 10% Preferred Stock 7,500 12% Common Equity 10,000 17% What is Wannalancit's weighted average cost of...
-
Bernie Madoff is well-known for being the orchestrator of the largest Ponzi scheme yet. His fraudulent machination crossed continents and was only able to be felled by something larger than his...
-
Set up the equations for the n-parameter Ritz approximation of the following equations associated with a simply supported beam and subjected to a uniform transverse load q = 40: dx dx =q for 0
-
In what manner does the media depict and represent the societal fabric within which it operates?
-
Tesla - Production challenges leading to delays in electric vehicle deliveries. Explain the Supply Chain & Operations of the Organization The problem in detail, how it originated or occurred, what...
-
A company produces earbuds. The revenue from the sale of x units of these earbuds is R = 8x. The cost to produce x units of earbuds is C = 3x + 1500. In what interval will the company at least break...
-
Why do spurious tuples occur in the result of joining the EMP_PROJ1 and EMPLOCS relations of Figure 15.5 (result shown in Figure 15.6)?
-
Consider the following relations for a database that keeps track of student enrollment in courses and the books adopted for each course: STUDENT (SSN, Name, Major, Bdate) COURSE (Course#, Quarter,...
-
Specify queries (a), (b), (c), (e), (f), (i), and (j) of Exercise 6.16 in both tuple and domain relational calculus.
-
(a) A photon of energy \(E_{0}\) strikes a free electron at rest in the lab. ("Free" here means the electron is not bound inside an atom.) Is it possible for the photon to be absorbed by the...
-
The quantity \(\lambda_{C} \equiv h / m_{e} c\) is called the "Compton wavelength" of the electron. (a) If a photon scatters off an electron at rest with scattering angle \(\theta=45^{\circ}\), what...
-
The Captain of an interstellar photon-rocket spaceship wishes to maintain a constant acceleration \(a\) in the instantaneous rest-frame of the ship, since that would provide a constant effective...
Study smarter with the SolutionInn App