What are the differences between the 288th salesperson's predicted annual sales and his or her actual sales thus far?
288th sales person refers to BusinessEntityID = 288; predited annual sales refers to SalesQuota; actual sales refers to SalesYTD; difference = Substract(SalesQuota(BusinessEntityID(288))), (SalesYTD(BusinessEntityID(288)));
SELECT SalesYTD - SalesQuota FROM SalesPerson WHERE BusinessEntityID = 288