DATABASE SYSTEMS
DATABASE SYSTEMS
13th Edition
ISBN: 9780357095607
Author: Coronel
Publisher: CENGAGE L
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Chapter 9, Problem 11RQ

Explanation of Solution

List of activities involved in the verification of an ER (Entity Relationship) model:

The below are the list of activities involved in the verification of the ER( entity relationship) model:

Step1: Central Entity of the ER model is identified.

Step 2: Every module and its components are identified.

Step 3: Transaction requirements of the each module are identified.

  • The internal requirements may be update, insertion, deletion, queries and reports.
  • The external requirements.

Step 4: The processes are verified against the modules processing and reporting requirements.

Step 5: The necessary and suggested changes that are done in the previous steps are made.

Step 6: The steps 2 to 5 are repeated for all the modules present.

ER verification process:

  • The verification process takes place after the merging process has been completed...

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Write .php file that saves car booking and displays feedback.  There are 2 buttons, which are <Book it> <Select a date>. <Select a date> button gets an input from the user, start date and an end date. Book it button can be pressed only if the start date and ending date are chosen by the user. If successful, it books cars for specific dates, with bookings saved. Booking should be in the .json file which contains all the bookings, and have the following information: Start Date. End Date. User Email. Car ID. If the car is already booked for the selected period, a failure message should be displayed, along with a button to return to the homepage. In the booking.json file, if the Car ID and start date and end date matches, it fails Use AJAX: Save bookings and display feedback without page refresh, using a custom modal (not alert).
Write .php file with the html that saves car booking and displays feedback.  Booking should be in the .json file which contains all the bookings, and have the following information: Start Date. End Date. User Email. Car ID. There are 2 buttons, which are <Book it> <Select a date> Book it button can be pressed only if the start date and ending date are chosen by the user. If successful, book cars for specific dates, with bookings saved. If the car is already booked for the selected period, a failure message should be displayed, along with a button to return to the homepage. Use AJAX: Save bookings and display feedback without page refresh, using a custom modal (not alert). And then add an additional feature that only free dates are selectable (e.g., calendar view).
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