Hola a todos
Tengo la siguiente consulta
declare @LOYALTY_GROUP_ID numeric(4)
declare @DATE1 varchar(100)
declare @DATE2 varchar(100)
declare @IDENTIFICATION_ID varchar(100)
declare @COMPANY_OFFICE_ID numeric(4)
 
set @LOYALTY_GROUP_ID = 4
set @DATE1 = '01/01/2011'
set @DATE2 = '24/05/2011'
set @IDENTIFICATION_ID = ''
set @COMPANY_OFFICE_ID = 1
 
 
select distinct LF_RECORD.CLIENT_ID,
LF_CLIENT.IDENTIFICATION_ID,
LF_CLIENT.FIRST_NAME +' '+LF_CLIENT.LAST_NAME as CLIENT_FULL_NAME,
LF_CLIENT.EXTERNAL_ID,
LF_CLIENT_IDENTIFICATION.CODE,
SUM(LF_RECORD.VALUE) as SUM_VALUE, 
SUM(LF_RECORD.QUANTITY) as SUM_QUANTITY
from
LF_RECORD 
inner join
LF_CLIENT on LF_CLIENT.CLIENT_ID = LF_RECORD.CLIENT_ID 
inner join
BA_COMPANY_OFFICE on BA_COMPANY_OFFICE.COMPANY_OFFICE_ID = LF_RECORD.COMPANY_OFFICE_ID 
inner join
BA_COMPANY on BA_COMPANY.COMPANY_ID = BA_COMPANY_OFFICE.COMPANY_ID 
inner join
LF_CLIENT_IDENTIFICATION on LF_CLIENT_IDENTIFICATION.CLIENT_ID = LF_CLIENT.CLIENT_ID
where 
LF_RECORD.LOYALTY_GROUP_ID = @LOYALTY_GROUP_ID and LF_RECORD.RECORD_TYPE='1' 
and LF_RECORD.DOCUMENT_DATE BETWEEN @DATE1 AND @DATE2
and LF_CLIENT.IDENTIFICATION_ID like '%' + CAST((CASE WHEN @IDENTIFICATION_ID = '' THEN IDENTIFICATION_ID ELSE @IDENTIFICATION_ID END) AS VARCHAR) + '%'
and LF_RECORD.COMPANY_OFFICE_ID in (@COMPANY_OFFICE_ID)
group by LF_RECORD.CLIENT_ID,LF_CLIENT.IDENTIFICA… +' '+LF_CLIENT.LAST_NAME,LF_CLIENT.EXTERNAL… LF_CLIENT_IDENTIFICATION.CODE 
 
Esta arroja el siguiente resultado
 
 
CLIENT_ID	IDENTIFICATION_ID	CLIENT_FUL… EXTERNAL_ID	CODE	 SUM_VALUE SUM_QUANTITY
6	 1017167504	 JULIAN MESA	 FHC936	 810	 3.469.090.000	349.628
6	 1017167504	 JULIAN MESA	 FHC936	 FHC936	3.469.090.000	349.628
10	 10238095	 GUILLERMO OCHOA CASTRILLON	TPX041	 218	 6.354.000.000	753.459
10	 10238095	 GUILLERMO OCHOA CASTRILLON	TPX041	 TPX041	6.354.000.000 753.459
11	 102465985	 CONSTRUMADERAS LTDA. ELL364	 328	 2.689.730.000	945.933
11	 102465985	 CONSTRUMADERAS LTDA. ELL364	 329	 2.689.730.000	945.933
11	 102465985	 CONSTRUMADERAS LTDA. ELL364	 330	 2.689.730.000	945.933
 
 
 
Mi pregunta es, que debo colocar en la consulta SQL y en donde, para que solo me seleccione el primer registro de cada cliente? 
   
 






