1.
https://www.chegg.com/homework-help/questions-and-answers/sql-server-1-time-new-state-added-updated-states-table-verify-statecode-follows-pattern-fi-q23492443

2.
https://www.chegg.com/homework-help/questions-and-answers/sql-server-1-create-stored-procedure-takes-recipe-name-input-output-list-ingredients-qty-m-q23493299

3.
https://www.chegg.com/homework-help/questions-and-answers/sql-1-every-time-recipe-changed-existing-recipe-new-ingredient-added-qty-existing-ingredie-q23492564