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Looking for help on this challenge?
SELECT COUNT (*) AS ordered_yesterday_and_shipped FROM orders WHERE status = "shipped" AND ordered_on BETWEEN DATE("now") AND ("now", -1);
Your missing the column ordered_on in your condition
SELECT COUNT(*) AS ordered_yesterday_and_shipped FROM orders WHERE status = "shipped" AND ordered_on = DATE("now", "-1 day");
Using between would include items from today. The challenge just wants items from yesterday or date = now -1 day.