Problem Statement:
Here we will try to answer a few simple questions about customers, especially about
- visiting patterns,
- how much money they’ve spent and also
- which menu items are their favourite.
Having answers to these questions will help us to deliver a better and more personalised experience for customers.
- What is the total amount each customer spent at the restaurant?
- How many days has each customer visited the restaurant?
- What was the first item from the menu purchased by each customer?
- What is the most purchased item on the menu and how many times was it purchased by all customers?
- Which item was the most popular for each customer?
- Which item was purchased first by the customer after they became a member?
- Which item was purchased just before the customer became a member?
- What is the total items and amount spent for each member before they became a member?
- If each $1 spent equates to 10 points and sushi has a 2x points multiplier - how many points would each customer have?
- In the first week after a customer joins the program (including their join date) they earn 2x points on all items, not just sushi - how many points do customer A and B have at the end of January?
For this case study, we have used both Microsoft SQL Server Management Studio and MySQL Workbench
To see the solution in
This Case study is a part of 8 Week SQL Challenge by Danny Ma