Question: RELATIONAL ALGEBRA HELP THANKS 3. ( 6 points) Write the following queries in relational algebra, using the schema below, where the primary keys are underlined.

RELATIONAL ALGEBRA HELP THANKS

RELATIONAL ALGEBRA HELP THANKS 3. ( 6 points) Write the following queries

3. ( 6 points) Write the following queries in relational algebra, using the schema below, where the primary keys are underlined. employee (eid, ename, street, city) company (cid, cname, city) works (eid, cid, salary) manages (eid, manager id) (note: manager_id is a foreign key referencing eid in employee relation. In other words, managers are also employees.) a. Find the eids, enames, street, and cities of residence of all employees who work for "First Bank Corporation" and earn more than $10,000. b. Find the eids and enames of all employees who live in the same city as the company for which they work. c. Find the ename of Peter Parker's manager

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Databases Questions!

RELATIONAL ALGEBRA HELP THANKS 3. Consider the following relational schema, where the primary keys are underlined, Suppliers(sid, sname, address) Parts(pid, pname, color) Catalog(sid, pid, price)...

Hello, I need help for CS (RELATIONAL DATABASE SYSTEMS) class homework. It must be done in SQL Language 1. Write the following queries in relational algebra , using the schema blow, where the primary...

Write the following queries in relational algebra, using the schema below, where the primary keys are bolded. employee ( eid , ename, street, city) company ( cid , cname, city) works ( eid , cid ,...

Problem 3. (20 points) Understanding of Relational Algebra Consider the following relational schema from which the underlined fields represent the keys to represent information about a hotel,...

RELATIONAL ALGEBRA HELP THANKS Running Example: Schema Diagram for University Database 2. (6 points) Write the following queries in relational algebra, using the university schema I gave you in...

Answer this question using a subquery if needed, thanks! SQL statement must prompt table in my SQL workbench 2. Retrieve the name and salary of the two highest salaried employees for the department...

Answer this question using subqueries if needed. Thanks! 1. Find the minimum, maximum, and average salary in each department. Query: DROP DATABASE IF EXISTS HW1; CREATE DATABASE HW1; Use HW1; CREATE...

Consider the following schema: SUPPLIERS (SID: integer, SNAME: string, STREET: string, CITY: string, ZIP: string) PARTS (PID:integer, PNAME: string, COLOR: string) CATALOG (SID: integer, PID:...

Consider the following relational schema. An employee can work in more than one department; also, the percentTime field of the Works relations shows the percentage of time that a given employee works...

Database design and technology As a database developer, you have been asked to design a new database the operation of the new project within the Liverpool John Moores University (LJMU). LJMU is...

Use the HLOOKUP function in cell H11 to calculate freight cost based on the shipping class and state to which the shipment is going. Freight Cost can be referenced on the "Freight Cost" lookup table...

Seventy percent of kids who visit a doctor have a fever, and 30% of kids with a fever also have sore throats. What's the probability that a kid who goes to the doctor has a fever and a sore throat?

In perfect and integrated financial markets, multinational corporations are unable to achieve diversification benefits that cannot be replicated by individual investors or portfolio managers.

The first scenario will be a Verbal Judo scenario in which your scenario follows the standard Verbal Judo interaction: You need to ask somebody to modify their behavior either to do something or to...

Responsibility. There is a guarded attitude towards giving too much responsibility, as workers like guidance and older workers in particular prefer clear instructions. Motivation rises when more...

Money. Generally money is seen as important for recruiting and retaining employees, but not as a real motivator. It is seen as a hygiene factor in that it keeps staff in the company.

Bonus systems. It is considered that bonuses relating to individual performance would improve motivation, but this view is not widespread. One company pays a fixed salary only. Some companies offer...