ERD and Keys A hotel has many rooms.  A guest can make a reservation for one room or multiple rooms.  A reservation is associated with only one guest. Draw an ERD with the relationships and resolve any many to many relationships.  Create an ID for each entity you create (for example RoomID, GuestID, Reservation ID) as the Primary Key.  Identify any foreign keys in each entity where appropriate.

how to Create three or more SQL Data Control Language (DCL) Statements using the Homework Database: EMPLOYEE, STORE, REGION, and SUPPLIER Database.   Create a new user statement for the database.  The user name should be based on yourself containing your name.   Statements that grant privileges to the new user.  Statements granting privileges to at least 2 of the tables in the assigned database Statements that revoke privileges to the new user.  Statements revoking privileges to at least 2 of the tables in the assigned Database the home work data base: -- creating the RegionStore DataBase DROP DATABASE IF EXISTS RegionStore; CREATE DATABASE RegionStore; USE  RegionStore; -- creating the Region table CREATE TABLE Region ( regionID         VARCHAR(10), regionName       VARCHAR(50), supervisor       VARCHAR(50), CONSTRAINT PRIMARY KEY (regionID) ); -- creating the store table  CREATE TABLE Store  ( storeID           VARCHAR (10), storeAddress      VARCHAR (50), phone…

Which of the following defines a relationship in which each occurrence of data in one entity is represented by multiple occurrences of the data in the other entity?a. one-to-oneb. one-to-manyc. many-to-manyd. none of the above

Scenario and Database Model: InstantRide InstantRide is the new ride sharing application in the city and it has just started its operations. With the help of the InstantRide mobile application, the users request a ride with their location. Drivers and cars are assigned to the request; and then the driver picks up the user to ride their requested location. Information for the users, drivers and cars are stored in the database as well as the travel transactions. In the USERS table, information for the users are stored with their first name, last name and email:   In the DRIVERS table, all the drivers in the InstantRide are stored with their name, driving license number and check and rating information:   In the CARS table, all the cars in the InstantRide system are kept with the license plate, model and year:   Finally, the transactions of the rides are stored in the TRAVELS table. For each travel, start and end time with location are stored. In addition, the involved driver, car and…

Each relationship is mapped into a relation? true or false

Which of the following defines a relationship in which each occurrence of data in one entity is represented by only one occurrence of data in the other entity?a. one-to-oneb. one-to-manyc. many-to-manyd. none of the above

For the below 'bank' schema: customer(customerid, username,fname, Ina me,street1,street2,city,state,zip) account(accountid, customerid, description,) transaction(transactionid,trantimestamp, acc ountid, amount) A customer may have several accounts, and each account may participate in many transactions. Each transaction will have at least two records, one deducting amount from an account, and one adding amount to an account (for a single transactionid, the sum of amounts will equal zero). Using SQL, answer this question (write a SQL query that answers this question): 8. List the top 1% of customers (ordered by total balance).

Scenario and Database Model: InstantRide InstantRide is the new ride sharing application in the city and it has just started its operations. With the help of the InstantRide mobile application, the users request a ride with their location. Drivers and cars are assigned to the request; and then the driver picks up the user to ride their requested location. Information for the users, drivers and cars are stored in the database as well as the travel transactions. In the USERS table, information for the users are stored with their first name, last name and email:   In the DRIVERS table, all the drivers in the InstantRide are stored with their name, driving license number and check and rating information:   In the CARS table, all the cars in the InstantRide system are kept with the license plate, model and year:   Finally, the transactions of the rides are stored in the TRAVELS table. For each travel, start and end time with location are stored. In addition, the involved driver, car and…

Which of the following is NOT a property of a relation? Tick all that apply. [ ] Each cell in a relation cannot contain multiple values. [ ] Order of tuple is important. [ ] The name of a relation is unique. [ ] Values of an attribute from the same domain.