23. Customers With No Orders
EasyAdvanced Filteringanti-joinNOT EXISTS
An anti-join returns rows from one table that have no match
in another — the cleanest expression is NOT EXISTS.
Task: return the name of every customer who has never placed an order.
Order by name.
Tables
Loading schema…
Expected outputrows must come back in this order
Computing expected output…
This is the result for the example data above. On Submit your query is graded against this example plus 4 hidden edge cases — 5test cases in all. A sloppy query that only fits the example won't pass.
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