Subject: Database Management System Consider the following relations: PERSON(P_id,_F_name, L_name,Occupation, Salary, City) ORDER(O_id, P_id, Item, Quantity, Price, Order_date) The Primary Keys are P_id and O_id respectively. Express the following queries in SQL and Relational Algebra. a) Find the person's name and city

SQL Queries:   Given the following schema. Primary keys are underlined and highlighted in yellow and foreign keys are bold. The meaning of the relations is straightforward. Medical_Staff(MS_Id, MS_First, MS_Last, MS_PhoneNumber, MS_Occupation, Salary) Blood_Bank(Bank_Id, Bank_Name, Bank_Street, Bank_City, Bank_St, Bank_PhoneNumber) Donor(Donor_Id, Donor_First, Donor_Last, Donor_BloodType, Donor_City, Donor_St, DOB, TotalNumberOfDonations) Donation_Record(Donor_Id, Donation_Date, Donation_Amount) Employee(MS_Id, Bank_Id) Storage(Donor_Id, Donation_Date, Bank_Id)   Write SQL queries to answer the following questions:   a.Find the average donation amount for Sue Thompson (Donor Id = 3329) for the year 2018.                   b.Sum all donations by Bank for each State (i.e. the State the blood bank is located in, not the Donor).                     c.Find the name of the youngest donor and all the donations made in by that donor in 2020.

EMPLOYEE Frame Minit Lname Sen Bdate Address Sex Salary Super sen Dno +444 DEPARTMENT Dname Dnumber Mor an Mgr start date DEPT LOCATIONS Dnumber Dlocation PROJECT Prame Prumber Plocation Dnum WORKS ON Ennn Pno Hoir Hours DEPENDENT Esen Dependent name Se Bdate Relationship Reforential integrity constraints displayed on the COMFWNY relational database schema. One possible database state for the COMPANY relational database schema. EMPLOYEE Fname Minit Lname John Frankin T Sex Salary 30000 333445555 5 M 40000 Jo00665555 F 25000 Joe7e54321 43000 J88Ge5556 San Bdate Address Super en Dno 123456789 1965-01-09 731 Fondren, Hounton, TX M 333445555 1955-12-08 638 Voas, Houston, TX Go0087777 1960-01-19 3321 Castle, Spring. TX 987654321 1941-06-20 291 Berry, Bellaire, TX Narayan 666884444 1962-09-15 975 Fire Oak, Humibile, TX M B Smith Wong Zelaya Wallace 5 Alicia 4 Jennifer F 38000 333445655 25000 333445555 M 25000 007654321 M 55000 NULL Ramesh English 453453453 1972-07-31 5631 Rice, Houston, TX F…

Assume the e-commercial database shown in the Appendix. Write the following queries in (a) relational algebra and (b) SQL. State your assumptions if the semantics is not clear. 1) Find the names of all students who have not taken any courses.     APPENDIX  STUDENTS(student id, first_name, last _name, email, major_code, class_year) COURSES(course id, course_name, course_description, credits, department_code) ENROLLMENTS(student id, course id, semester, grade) MAJORS(major code, major_name, department_code) DEPARTMENTS(department code, department_name)