SQL组计算问题

Question

我在使用SQL编写报表方面相当新，并且遇到％计算问题。按部门和员工的查询分组，包括YTDAccrued，YTDUsed和Reversing的计算。反转是我遇到问题的计算（YTDUsed / YTDAccrued）。按员工分组计算罚款是按部门计算的组，似乎没有正常工作，它是添加所有员工％计算而不是仅为部门进行单独计算。如何让组“部门”正确计算？我附上了结果图片。

    DECLARE @calyr varchar(4) Select @Calyr = '2014'

    SELECT asi_ptoytdbalances.Calyr,
       Department,
       asi_ptoytdbalances.EmpID,
       asi_ptoytdbalances.NameLast,
       asi_ptoytdbalances.NameFirst,
       SUM(CASE WHEN asi_PTOytdBalances.Description = 'Monthly Earned PTO' THEN Round((PTO),2) ELSE 0.00 END) AS YTDAccrued,
       Sum(CASE WHEN asi_PTOytdBalances.Description = 'PTO Used' THEN Round((PTO),2) * -1 ELSE 0.00 END)AS YTDUsed,
       Round((Sum(CASE WHEN asi_PTOytdBalances.Description = 'PTO Used' THEN PTO * -1 END)/SUM(CASE WHEN asi_PTOytdBalances.Description = 'Monthly Earned PTO' THEN PTO END)),4)AS Reversing
FROM ASI_PTOytdBalances
WHERE Calyr= @calyr
  AND Description <> ''
GROUP BY asi_ptoytdbalances.Calyr,
         asi_PTOytdBalances.Department,
         asi_PTOytdBalances.EmpID,
         asi_ptoytdbalances.NameLast,
         asi_ptoytdbalances.NameFirst
ORDER BY asi_PTOytdBalances.Department,
         asi_PTOytdBalances.EmpID

PTO Report