Find at least 3 products similar to what the customer wants. How
do they differ? How expensive are they? What features about them do you like
and may be able to incorporate into your design?
https://mailchimp.com/resources/what-is-competitor-analysis/
product
1, https://www.sqlcourse.com/advanced-course/mathematical-functions/
2, https://sqlzoo.net/wiki/SQL_Tutorial
3, https://www.codecademy.com/courses/learn-sql/lessons/manipulation/exercises/sql