[DATABASE]SQL query examples

There are three relations used for this example – RENTAL_CUSTOMER, CAR, RENTAL.
Below are the SQL statements used to create the relations.
Screenshot 2018-11-30 at 10.55.29 PM
Screenshot 2018-11-30 at 11.02.36 PM.png
Screenshot 2018-11-30 at 11.13.20 PM.png

Data have been inserted to the relations:
Screenshot 2018-11-30 at 11.20.54 PM

Screenshot 2018-11-30 at 11.22.21 PM.png

Screenshot 2018-11-30 at 11.22.57 PM

List all cars rented by Smith since 1st of August 2017
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List each make of the cars and the total number of cars rented of that make
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A new car is bought and is updated to CAR, List the each make of the car and the number of that make
The new record of CAR:
Screenshot 2018-11-30 at 11.42.08 PM

Now count the number of cars of each make:
Screenshot 2018-11-30 at 11.43.25 PM

List the registration number and the make of the cars that have not been rented
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Update Jones phone number to 988-2223
Before change:
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The change statement:

Screenshot 2018-12-01 at 12.03.17 AM
after the change:
Screenshot 2018-12-01 at 12.04.25 AM

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