Among the employees who have more than 10 hours of sick leave, how many of them wish to receive e-mail promotions?
Contact does wish to receive e-mail promotions refers to EmailPromotion = (1,2); more than 10 hours of sick leave refer to SickLeaveHours >10;
SELECT COUNT(T1.BusinessEntityID) FROM Employee AS T1 INNER JOIN Person AS T2 ON T1.BusinessEntityID = T2.BusinessEntityID WHERE T2.EmailPromotion = 1 AND T1.SickLeaveHours > 10