Customers with no orders
Find customers who have never placed an order. Show customer_id, first_name, last_name and email.
ShopX tables
Hints
Stuck? Reveal one hint at a time before looking at the answer.
Your answer
This is a workbook: your query is not run. Every model answer has been run against these tables.
How to approach this question
This is a intermediate ShopX SQL interview question that practises LEFT JOIN, Anti-join, NOT EXISTS. Read the schema first and note which table each column in the expected output comes from. Then decide whether you need a join, a filter, a grouping or a window function before you write any SQL.
Write your query in the answer box above, then compare it with the model answer and its checklist. Each model answer has been run against these tables. If you get stuck, reveal one hint at a time before you open the solution, which explains why the query works and lists common mistakes to avoid.
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