Blog.
Customers who spent below the average
SELECT Customer_Id, TotalSpend_90Days, AverageSpend_90days
FROM Customer_Spend_90DaysVsAVG
WHERE TotalSpend_90Days <= AverageSpend_90days
SELECT Customer_Id, TotalSpend_90Days, AverageSpend_90days
FROM Customer_Spend_90DaysVsAVG
WHERE TotalSpend_90Days <= AverageSpend_90days
