SELECT 
	customersince,
    Date() AS CurrentDate,
    Date() - CustomerSince AS DaysExisting, -- not correct
   julianday('now') AS JDayCurrent,
   julianday(customersince) AS JDayCust,
    ROUND(julianday('now') - julianday(customersince),0) AS DaysExisting,
    strftime('%J', 'now'), -- this is identical to  julianday('now'
    strftime('%m', 'now'),
    strftime('%Y', 'now') AS CurrentYear,
    strftime('%Y', customersince) AS CustSinceYear,
    strftime('%Y', 'now') - strftime('%Y', customersince) AS YearsExist,
    
    --datetime() AS DateTimeFunction,
 
FROM 
	Customers 