Attempt the question, check the explanation, and continue with similar questions to build confidence before exams.
SELECT CustID, COUNT(*) FROM SALE;
SELECT CustID, COUNT(*) FROM SALE GROUP BY CustID HAVING COUNT(*) > 1;
SELECT CustID FROM SALE WHERE COUNT(*) > 1;
SELECT COUNT(CustID) FROM SALE GROUP BY CustID;
Video Explanation
Watch Video Solution
Login to get access
Continue with nearby questions to strengthen the same chapter concept while you still have the context fresh in mind.