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Consider the following relational data model. Employee (empid, ename, address, title, headid) Works (Empid,Deptid,joindate) Department (Deptid, dname, block) Payment (title, salary) A) Write relational algebra for Display the employee name and department name of each employee. Display the employee who works as senior lecturer and belongs to BEI or BCT department. Display the employee name with corresponding department head.

Consider the following relational data model. Employee (empid, ename, address, title, headid) Works (Empid,Deptid,joindate) Department (Deptid, dname, block) Payment (title, salary) A) Write relational algebra for Display the employee name and department name of each employee. Display the employee who works as senior lecturer and belongs to BEI or BCT department. Display the employee name with corresponding department head.

Database Systems: Design, Implementation, & Management
Database Systems: Design, Implementation, & Management
11th Edition
ISBN:9781285196145
Author:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Publisher:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Chapter7: Introduction To Structured Query Language (sql)
Section: Chapter Questions
Problem 65C: Write the SQL code to create the table structures for the entities shown in Figure P7.65. The...
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  1. Consider the following relational data model.

Employee (empid, ename, address, title, headid)

Works (Empid,Deptid,joindate)

Department (Deptid, dname, block)

Payment (title, salary)

A) Write relational algebra for

  1. Display the employee name and department name of each employee.
  2. Display the employee who works as senior lecturer and belongs to BEI or BCT department.
  3. Display the employee name with corresponding department head.

 

B) Write sql query for

  1. Creating the above relations; including appropriate versions of all primary and foreign key constraints
  2. Find the employee name and address whose address name ends with substring ‘pur’.
  3. Update the salary of senior lecturer by 25%.

    (Solve  A - 1,2,3 only)
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