求救啊一个简单存储过程的查询速度优化?该怎么解决

求救啊,一个简单存储过程的查询速度优化???
现在有一个存储过程查询,因为是查询中嵌套子查询,所以速度很慢,那为高手可以优化一下啊
存储过程如下:

CREATE PROCEDURE Sp_ClickAmTotal
@name char(10),
@rq char(10),
@count int OUTPUT
AS
select count(*) from
  (select * from employee where hjbmbh in (select distinct
ShowDept from Dept where [email protected])) as E,
  (select distinct kh COLLATE chinese_PRC_CI_AI as kh from kimkqdata
  where [email protected] and (hs1<11 or (hs1=11 and ms1<15))) as K
where E.kqkh=K.kh

------解决方案--------------------

SQL code

--try:CREATE PROCEDURE Sp_ClickAmTotal @name char(10), @rq char(10), @count int OUTPUT AS select count(1)  from     (select kqkh from employee where exists(select 1       from Dept where ShowDept=hjbmbh and [email protected])) as E,     (select distinct kh COLLATE   chinese_PRC_CI_AI as kh from kimkqdata       where [email protected] and (hs1 <11 or (hs1=11 and ms1 <15))) as K where E.kqkh=K.kh