Imagine you are a data engineer, recently hired by Yelp to support one of their data science teams. Your first task is to build a relational database for experimenting with new machine learning tools. The database will mirror the structure of Yelp's main production database, but with only a subset of the total data. In addition to setting up the database, your manager also wants you to document it in a data dictionary and ERD so the data scientists understand its structure. Finally, a colleague on the Partner Insights teams needs to answer some questions about Yelp's users and business partners. The rest of your team is busy, so your manager would like you to use the new database to answer those questions