select a.creater,
  ltrim(datediff(mi,a.createtime,a.updatetime)/nullif(count(distinct b.pid),0))+'分钟' as [everyAct],
  ltrim(datediff(mi,a.createtime,a.updatetime)/nullif(count(distinct b.typeno),0))+'分钟' as [everyTct],
  px=row_number() over (order by datediff(mi,a.createtime,a.updatetime)/nullif(count(distinct b.pid),0))
from 主表 a join 明细表 b on a.id = b.billid
group by a.creater,a.createtime,a.updatetime

------解决方案--------------------

SQL code

declare @主表 table (BILLID int,CREATTIME datetime,UPDATETIME datetime,CREATER varchar(3))
insert into @主表
select 1001,'2011-09-11 09:00','2011-09-11 09:06','AAA' union all
select 1002,'2011-09-11 09:00','2011-09-11 10:06','BBB'

declare @明细表 table (BILLID int,PID varchar(5),TYPENO varchar(4))
insert into @明细表
select 1001,'P1001','UUIO' union all
select 1001,'P1002','UUIO' union all
select 1001,'P1003','YYXJ' union all
select 1002,'P1001','X90X' union all
select 1002,'P1002','ME90'

select CREATER,
单张花费=
ltrim(datediff(mi,a.CREATTIME,a.UPDATETIME)/b.c)+'分钟',
单个TYPENO花费=
ltrim(datediff(mi,a.CREATTIME,a.UPDATETIME)/c.c)+'分钟'
from @主表 a 
left join 
(select BILLID,count(1) as c from @明细表 group by BILLID 
) b on a.BILLID=b.BILLID
left join 
(select BILLID,count(distinct TYPENO) as c from @明细表 group by BILLID
) c on a.BILLID=c.BILLID
/*
CREATER 单张花费             单个TYPENO花费
------- ---------------- ----------------
AAA     2分钟              3分钟
BBB     33分钟             33分钟
*/

------解决方案--------------------

SQL code
--主表
--BILLID CREATTIME UPDATETIME CREATER
--1001 2011-09-11 09:00 2011-09-11 09:06 AAA
--1002 2011-09-11 09:00 2011-09-11 10:06 BBB

--明细表
--BILLID PID TYPENO
--1001 P1001 UUIO
--1001 P1002 UUIO
--1001 P1003 YYXJ
--1002 P1001 X90X
--1002 P1002 ME90

create table  matb(BILLID INT, CREATTIME VARCHAR(50), UPDATETIME VARCHAR(50),CREATER VARCHAR(50) )
INSERT INTO matb select  1001 ,'2011-09-11 09:00 ','2011-09-11 09:06',' AAA' union all

select 1002,'2011-09-11 09:00', '2011-09-11 10:06', 'BBB'

create  TABLE mxtb ( BILLID int ,PID varchar(50),TYPENO VARCHAR(50)   )
INSERT INTO mxtb 
select 1001, 'P1001', 'UUIO' union all
select 1001, 'P1002', 'UUIO' union all
select 1001, 'P1003', 'YYXJ' union all
select 1002, 'P1001', 'X90X' union all
select 1002, 'P1002', 'ME90'  
--要求计算每个人平均处理子单据的时间:
--CREATER 单张花费 单个TYPENO花费 排名
-- AAA    2分钟       3分钟           1
-- BBB    33分钟      33分钟          2
 


select a.creater,
  ltrim(datediff(mi,a.CREATTIME,a.UPDATETIME)/nullif(count(distinct b.pid),0))+'分钟' as 单张花费,
  ltrim(datediff(mi,a.CREATTIME,a.UPDATETIME)/nullif(count(distinct b.typeno),0))+'分钟' as 单个TYPENO花费,
  row_number() over (order by datediff(mi,a.CREATTIME,a.UPDATETIME)/nullif(count(distinct b.pid),0)) AS 排名
from matb a join mxtb b on a.BILLID = b.BILLID
group by a.creater,a.CREATTIME,a.UPDATETIME




creater                                            单张花费             单个TYPENO花费       排名
-------------------------------------------------- ---------------- ---------------- --------------------
 AAA                                               2分钟              3分钟              1
BBB                                                33分钟             33分钟             2

(2 行受影响)

------解决方案--------------------