Проблема со случаем, когда в MS SQL

Question

У меня есть таблица с номером участника, именем, full_desc и activity_type, как показано ниже

MEM_NO  Name    full_desc                 Activity_type
1233    John    LM Application received     9097
1233    John    Retired                     9630
1234    Mark    LM Application received     9097
3325    Steve   LM Application received     9097
3325    Steve   Retired                     9630
6566    Gareth  Retired                     9630
7088    Daniel  Resign                      9629

Я хочу, чтобы вывод был

MEM_NO  Name    full_desc           Activity_type     Status
1233    John    LM Application received 9097       LM Application received
1234    Mark    LM Application received 9097       LM Application received
3325    Steve   LM Application received 9097       LM Application received
6566    Gareth  Retired                 9630        No LM Recevied
7088    Daniel  Resign                  9629        No LM Recevied

Примечание: -

1) Я хочу показать отдельных участников, у которых активность_типа 9097 и 9630 или 9629 должны иметь статус "Заявка LM получена"

2) Участник, к которому прикреплен только action_type 9097, также должен иметь статус «Заявка LM получена»

3) Члены, у которых нет прикрепленного Activity_type 9097, но у них есть либо 9630, либо 9326, показывают свой статус как «Не получен LM».

SELECT MBR.MEMBERSHIP_NO,IND.TITLE,IND.FORENAMES,IND.DATE_OF_BIRTH,DATEADD(dd, 0, DATEDIFF(dd, 0, AL.ACTION_DATE)) as 'Date',LU1.FULL_DESC,COUNT(mbr.MEMBERSHIP_NO) as Total_Retired, null as Life_app_received,null as Total_Resign,
CASE WHEN AL.ACTIVITY_TYPE in (9630,9097) THEN  'LM Application received' ELSE 'NO LIFE' END AS STATUS
 ---AL.ACTIVITY_DATE,
FROM INDIVIDUAL IND
JOIN ACTIVITY_LOG AL ON AL.INDIVIDUAL_REF=IND.INDIVIDUAL_REF
JOIN LOOKUP_TABLE LU1 ON LU1.LOOKUP_TABLE_REF=AL.ACTIVITY_TYPE-----------------------MEM - 0 - Future Cancellation - Retired
JOIN MEMBER MBR ON MBR.INDIVIDUAL_REF=IND.INDIVIDUAL_REF
WHERE  AL.ACTIVITY_TYPE IN (9630,9097) AND  AL.ACTION_DATE BETWEEN '2017-01-01' AND '2020-12-31' --AND MBR.MEMBER_STATUS=33
GROUP BY MBR.MEMBERSHIP_NO,IND.TITLE,IND.FORENAMES,IND.DATE_OF_BIRTH,DATEADD(dd, 0, DATEDIFF(dd, 0, AL.ACTION_DATE)),LU1.FULL_DESC,AL.ACTIVITY_TYPE

Выше мой запрос, который не может принести то, что я хочу. Любая помощь очень ценится

Answer 1

Попробуйте с row_number ()

select *,case when full_desc='LM Application received' then 'LM Application received' else 'No LM Recevied' end as status from 
(select mem_no,name,full_desc,activity_type,row_number() over(partition by mem_no,name order by case when full_desc='LM Application received' then 2 when full_desc='Retired' then 1
when full_desc='Resign' then 0 end desc) as rn
from tablename) a where rn=1

Answer 2

Пожалуйста, проверьте ниже запрос и попробуйте понять. Я использую его с Временной таблицей, вы можете заменить его на имя вашей исходной таблицы.

IF OBJECT_ID('tempdb..#Tempdata') IS NOT NULL
    DROP TABLE #Tempdata

create table #Tempdata
(
    Mem_no int,
    Name varchar(250),
    full_desc varchar(max),
    activity_type int
)

INSERT INTO #Tempdata
select '1233','John','LM Application received','9097' UNION
select '1233','John','Retired','9630'  UNION
select '1234','Mark','LM Application received','9097'   UNION
select '3325','Steve','LM Application received','9097' UNION
select '3325','Steve','Retired','9630' UNION
select '6566','Gareth','Retired','9630' UNION
select '7088','Daniel','Resign','9629'

select *, CASE WHEN activity_type = '9097' THEN 'LM Application received' ELSE 'No LM Recevied' END  as Status from (
select ROW_NUMBER() OVER(PARTITION BY Mem_no,Name ORDER BY Mem_no,Name) as Rnk,
Mem_no , Name ,full_desc ,activity_type  from #Tempdata
) as D
where D.Rnk = 1

Answer 3

Это подсказывает мне row_number() функцию с условным упорядочением:

select top (1) with ties t.*, (case when Activity_type =  9097 
                                    then t.full_desc else 'No LM Received' 
                               end) as Status
from table t
order by row_number() over (partition by mem_no 
                                order by (case when Activity_type =  9097 
                                               then 0 else 1 
                                          end)
                           );