https://www.chegg.com/homework-help/questions-and-answers/task-1-60-information-implement-database-tables-postgresql-choosing-sensible-data-types-co-q71759446

https://www.chegg.com/homework-help/questions-and-answers/task-2-10-query-answer-single-postgresql-query-queries-return-information-return-data-spec-q71369555