Who is the top sales person who achived highest percentage of projected sales quota in 2013?
2013 refers to QuotaDate = '2013'; DIVIDE(SalesLastYear), (SUM(SalesQuota where YEAR(QuotaDate) = 2013)) as percentage

SELECT BusinessEntityID FROM SalesPerson WHERE BusinessEntityID IN ( SELECT BusinessEntityID FROM SalesPersonQuotaHistory WHERE STRFTIME('%Y', QuotaDate) = '2013' ) ORDER BY CAST(SalesLastYear AS REAL) / SalesQuota DESC LIMIT 1