In fig 2, what type of single level ordered index would be deployed by the DBMS for the attribute RENTALS.CID? Group of answer choices B-Tree Primary Index Common Index Clustering Index

The following tables form part of a database held in a relational DBMS (Primary Key, Foreign Key):   CLIENT     (ClientID, ClientName, AnnualRevenue) VESSEL    (VesselNumber, VesselName, MaxWeight) Driver        (DriverID, DriverName) COUNTRY (CountryName, Population) TRANSACTION(TransNumber, ClientID, DriverID, VesselNumber,  DepartureCountryName, DestinationCountryName, Year, TransactionWeight) Formulate relational algebra (NOT SQL) expressions for each of the following: Names of Drivers who delivered transactions in 2019 or 2020. Total weight of transactions per year for each country of departure. Drivers who drove vessels to Spain and to Turkey.

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.

Explain the role of functional dependencies and candidate keys in normalization.