Write SQL commands to INSERT some data into the tables $($see slides$).$ Maintain

these commands in a separate SQL le$.$

$2.$ Try to create some simple SQL queries to SELECT data. You can look to the queries

developed in the demo for some inspiration. Maintain these commands in a separate

SQL le$.$

$3.$ Modify the database with some more advanced constraints $($see slides$).$ Then modify

your INSERT and SELECT statements to test whether these constraints work