执行存储过程时获取空值

Question

我有一个这样的存储过程：

ALTER procedure [dbo].[Driverperformance]
   @Ecode     NVARCHAR(50), 
   @startdate DATETIME, 
   @enddate   DATETIME 
AS 
BEGIN 
  DECLARE @date1 DATETIME = CONVERT(DATETIME, @startdate + ' 00:01:00.000', 120); 
  DECLARE @date2 DATETIME = CONVERT(DATETIME, @enddate + ' 23:23:59.000', 120); 

 ; WITH cnt AS
 (
    SELECT 
       e.ecode,   
       Cast(q.dtime AS DATE) AS Date,   
       e.ename, 
       Count(q.ecode) cntEcode   
    FROM 
       employeemaster_tbl e 
    JOIN 
       transaction_tbl q ON e.ecode = q.ecode 
    WHERE  
       q.ecode = @Ecode     
       AND dtime >= '' + @date1 + ''   
       AND dtime <= '' + @date2 + '' 
    GROUP BY 
       e.ecode,  
       e.ename,   
       Cast(q.dtime AS DATE)  
   ), 
   del AS
   (
     SELECT 
         e.ecode, 
         Cast(q.dtime AS DATE) AS Date, 
         e.ename, 
         Count(q.delecode)     CntDelEcode 
     FROM 
         employeemaster_tbl e 
     JOIN 
         transaction_tbl q ON e.ecode = q.delecode  
     WHERE 
         q.delecode = @Ecode 
         AND dtime >= '' + @date1 + '' 
         AND dtime <= '' + @date2 + '' 
     GROUP BY 
         e.ecode, 
         e.ename,   
         Cast(q.dtime AS DATE) 
   )
   SELECT 
      del.ecode, del.[Date], del.ename, 
      ISNULL(cnt.cntEcode, 0) CntEcode, 
      ISNULL(del.CntDelEcode, 0) AS CntDelEcode
   FROM 
      cnt
   FULL JOIN 
      del ON del.ecode = cnt.ecode AND del.[Date] = cnt.[Date]
           AND del.Ename = cnt.Ename
end

当我执行这个时，我得到的是null日期和员工姓名。我这样做了：

Ecode     Date    Ename     cntEcode   cntDelEcode
--------------------------------------------------
null     null        null     10         0
null     null         null      2        0

我的存储过程出了什么问题？我正在加入两张桌子