十万条数据，求按条件SQL分类汇总。

[IEEE_China]

create table #temp
(
	id int identity(1,1),	--自动编号
	tName nvarchar(100),	--姓名
	tCity nvarchar(100),	--城市
	tMonth int,				--月
	tPrice decimal(12,2),	--金额
	tFlag int				--是否收到,1收到，0未收到
)

Insert #temp 
select 'a','北京',1,100.00,1 union all
select 'b','北京',1,100.00,1 union all
select 'c','北京',1,100.00,1 union all
select 'd','重庆',1,100.00,1 union all
select 'e','重庆',1,100.00,1 union all
select 'f','重庆',1,100.00,1 union all
select 'g','上海',1,100.00,1 union all
select 'h','上海',1,100.00,1 union all
select 'i','上海',1,100.00,1 union all

 
select 'a','北京',2,100.00,1 union all
select 'b','北京',2,100.00,1 union all
select 'c','北京',2,100.00,0 union all
select 'd','重庆',2,100.00,1 union all
select 'e','重庆',2,100.00,1 union all
select 'f','重庆',2,100.00,0 union all
select 'g','上海',2,100.00,0 union all
select 'h','上海',2,100.00,1 union all
select 'i','上海',2,100.00,0 union all





select 'a','北京',3,100.00,0 union all
select 'b','北京',3,100.00,1 union all
select 'c','北京',3,100.00,0 union all
select 'd','重庆',3,100.00,0 union all
select 'e','重庆',3,100.00,1 union all
select 'f','重庆',3,100.00,0 union all
select 'g','上海',3,100.00,1 union all
select 'h','上海',3,100.00,1 union all
select 'i','上海',3,100.00,0 union all

select 'a','北京',4,100.00,1 union all
select 'b','北京',4,100.00,0 union all
select 'c','北京',4,100.00,0 union all
select 'd','重庆',4,100.00,1 union all
select 'e','重庆',4,100.00,0 union all
select 'f','重庆',4,100.00,0 union all
select 'g','上海',4,100.00,1 union all
select 'h','上海',4,100.00,0 union all
select 'i','上海',4,100.00,0 union all
 


select 'a','北京',5,100.00,0 union all
select 'b','北京',5,100.00,0 union all
select 'c','北京',5,100.00,0 union all
select 'd','重庆',5,100.00,0 union all
select 'e','重庆',5,100.00,0 union all
select 'f','重庆',5,100.00,0 union all
select 'g','上海',5,100.00,0 union all
select 'h','上海',5,100.00,0 union all
select 'i','上海',5,100.00,0 

汇总格式如下，按城市分组,每行中的one_All 指的是该城市所有tMonth等于1的 tPrice 和，
one_No 指的是该城市所有tMonth等于1且tFlag等于0的 tPrice 和，
two_All 指的是该城市所有tMonth等于2的 tPrice 和，
two_No 指的是该城市所有tMonth等于2且tFlag等于0的 tPrice 和，
以此类推。
每个月数据量都很大的情况下，如何汇总？
--tCity | one_All | one_No | two_All | two_No | three_All | three_No | Four_All | Four_No | Five_All | Five_No
----------------------------------------------------------------------------------------------------------------

[IEEE_China]

求解。

[發糞塗牆]

SELECT tCity,SUM(one_All)one_All,SUM(one_No)one_No,SUM(two_All)two_All,SUM(two_No)two_No,SUM(three_All)three_All,SUM(three_No)three_No,
 SUM(Four_All)Four_All,SUM(Four_No)Four_No,SUM(Five_All)Five_All,SUM(Five_No)Five_No
 FROM (
 SELECT tCity,CASE WHEN  tMonth=1  THEN SUM(tPrice ) END one_All,CASE WHEN  tMonth=1 AND tFlag=0 THEN SUM(tPrice ) END one_No,
 CASE WHEN  tMonth=2  THEN SUM(tPrice ) END two_All,CASE WHEN  tMonth=2 AND tFlag=0  THEN SUM(tPrice ) END two_No
 ,CASE WHEN  tMonth=3  THEN SUM(tPrice ) END three_All,CASE WHEN  tMonth=3 AND tFlag=0 THEN SUM(tPrice ) END three_No,
 CASE WHEN  tMonth=4  THEN SUM(tPrice ) END Four_All,CASE WHEN  tMonth=4 AND tFlag=0  THEN SUM(tPrice ) END Four_No
 ,CASE WHEN  tMonth=5  THEN SUM(tPrice ) END Five_All,CASE WHEN  tMonth=5 AND tFlag=0 THEN SUM(tPrice ) END Five_No
 FROM #temp 
 GROUP BY tCity,tMonth,tFlag
 )a 
 GROUP BY a.tCity
 /*
 tCity                                                                                                one_All                                 one_No                                  two_All                                 two_No                                  three_All                               three_No                                Four_All                                Four_No                                 Five_All                                Five_No
 ---------------------------------------------------------------------------------------------------- --------------------------------------- --------------------------------------- --------------------------------------- --------------------------------------- --------------------------------------- --------------------------------------- --------------------------------------- --------------------------------------- --------------------------------------- ---------------------------------------
 北京                                                                                                   300.00                                  NULL                                    300.00                                  100.00                                  300.00                                  200.00                                  300.00                                  200.00                                  300.00                                  300.00
 上海                                                                                                   300.00                                  NULL                                    300.00                                  200.00                                  300.00                                  100.00                                  300.00                                  200.00                                  300.00                                  300.00
 重庆                                                                                                   300.00                                  NULL                                    300.00                                  100.00                                  300.00                                  200.00                                  300.00                                  200.00                                  300.00                                  300.00
 警告: 聚合或其他 SET 操作消除了 Null 值。
 
 (3 行受影响)
 
 */