The following question are based on the database whose relational schemas are emp(EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO) and DEPT(DEPTNO, DNAME, LOC). (a)  Update employee SMITH’s job and salary to match that of employee WARD. (b)   List the employees joined in Jan with salary ranging from 1500 to 4000.   (c)   Find out the names and salaries of employees whose salaries greater than salaries of their managers. (d) Find out the manager’s name and number of employees who is having maximum number of employees working under him.

How to explain the view? "View" means what? Does view definition data exist in its format? What are the typical results of a view-based database access?

The purpose of this activity is to create a working mini-database system from a user’s basic requirements. SQL DDL and DML must be used to create, populate and update tables.   This database is for a typical Columbus car dealership. We will keep track of all the cars on the lot. For each car we will track the model ( modelA, modelB, modelC or make up your own), the list price, a status (available, sold) and a list of options the car has. A car may have more than one option (you may make these up, example: sun roof, power windows, …).. When the car is sold, we will keep track of the date, and the name of the salesman that sold the car. For each salesman, we will keep track of their name, gender, salary, and total amount sold.

In the definition of a relational database, explain what is meant by "normalized relations" ?