sql 联合查询速度慢，需要对其进行分组

分组：
SELECT   * FROM(
SELECT ROW_NUMBER() OVER(ORDER BY  ProjID) as row_number,* FROM (

select

ProjApplyDate,projProperty,ProjID,ProjStatusCurrent,ProjGuId,ProjEtpId,ProjRegionId,ProjName,ProjAddress,ProjAreaSize,ProjCost,ProjCreateTime,ProjChargePerson,ProjChargePersonPhone,ProjApplyEtp,ProjApplyPerson,ProjApplyPersonPhone,ProjConstructEtp,ProjConstructPM,ProjConstructPMPhone,ProjDirector,ProjDirectorPhone,ProjSafeOrgz,ProjCode,ProjIsEnable
,min(ConSignDate) as ConSignDate,max(ConBalanceDate) as ConBalanceDate  
from 
dbo.fn_GetProjectsByUserId(100093) as p INNER join (select
cog.ConProjId,cog.ConSignDate,cog.ConBalanceDate from dbo.Dat_Contract
as cog  group by cog.ConProjId,cog.ConSignDate,cog.ConBalanceDate ) as
co
on   co.ConProjId=p.ProjID   and ConSignDate<='2015-09-22'
and  ISNULL(ProjIsDeleted,0)!=1  group by
ProjApplyDate,projProperty,ProjID,ProjStatusCurrent,ProjGuId,ProjEtpId,ProjRegionId,ProjName,ProjAddress,ProjAreaSize,ProjCost,ProjCreateTime,ProjChargePerson,ProjChargePersonPhone,ProjApplyEtp,ProjApplyPerson,ProjApplyPersonPhone,ProjConstructEtp,ProjConstructPM,ProjConstructPMPhone,ProjDirector,ProjDirectorPhone,ProjSafeOrgz,ProjCode,ProjIsEnable
)as t1

) as tt where row_number between 1 and 5

---耗时0.01

SELECT   * FROM(
SELECT ROW_NUMBER() OVER(ORDER BY  ProjID) as row_number,* FROM (

select

ProjApplyDate,projProperty,ProjID,ProjStatusCurrent,ProjGuId,ProjEtpId,ProjRegionId,ProjName,ProjAddress,ProjAreaSize,ProjCost,ProjCreateTime,ProjChargePerson,ProjChargePersonPhone,ProjApplyEtp,ProjApplyPerson,ProjApplyPersonPhone,ProjConstructEtp,ProjConstructPM,ProjConstructPMPhone,ProjDirector,ProjDirectorPhone,ProjSafeOrgz,ProjCode,ProjIsEnable
,min(ConSignDate) as ConSignDate,max(ConBalanceDate) as ConBalanceDate  
from  dbo.fn_GetProjectsByUserId(100093) as p INNER join dbo.Dat_Contract as co
on  
co.ConProjId=p.ProjID   and ConSignDate<='2015-09-22' and 
ISNULL(ProjIsDeleted,0)!=1  group by
ProjApplyDate,projProperty,ProjID,ProjStatusCurrent,ProjGuId,ProjEtpId,ProjRegionId,ProjName,ProjAddress,ProjAreaSize,ProjCost,ProjCreateTime,ProjChargePerson,ProjChargePersonPhone,ProjApplyEtp,ProjApplyPerson,ProjApplyPersonPhone,ProjConstructEtp,ProjConstructPM,ProjConstructPMPhone,ProjDirector,ProjDirectorPhone,ProjSafeOrgz,ProjCode,ProjIsEnable
)as t1

) as tt where row_number between 1 and 5

--耗时 0.18