Problems for You to Solve
Below, we show you the request statement and the name of the solution query in the sample databases. If you want some practice, you can work out the SQL you need for each request and then check your answer with the query we saved in the samples. Don’t worry if your syntax doesn’t exactly match the syntax of the queries we saved—as long as your result set is the same.
Sales Orders Database
| 1. | “Show me customers who have never ordered a helmet.”
(Hint: This is another request where you must first build an INNER JOIN to find all orders containing helmets and then do an OUTER JOIN with Customers.) You can find the solution in CH09_Customers_No_Helmets (2 rows). |
| 2. | “Display customers who have no sales rep (employees) in the ... |
Get SQL Queries for Mere Mortals: A Hands-On Guide to Data Manipulation in SQL, Second Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
