Actually I posted a similar question related to this in here How to retrieve data from SQL Server as required below? and now I needed some changes in that so please see this before suggesting
I have a table like this :
CustName Country RecordedTime
---------------------------------------------
Alex Australia 2018-Jun-01 08:00 AM
Alex China 2018-Jun-01 10:00 AM
Alex Japan 2018-Jun-01 11:00 AM
John Australia 2018-Jun-01 08:00 AM
John China 2018-Jun-02 08:00 AM
Bob Australia 2018-Jun-02 09:00 AM
Bob Brazil 2018-Jun-03 09:50 AM
Bob Africa 2018-Jun-03 11:50 AM
Bob India 2018-Jun-03 12:55 AM
If new record is created and this record is changed several times in same day, then output to be the first and the last of changed records and if an existing record is changed several times the same day then output should be before of first change and current change
for example: If give input date as 2018-Jun-01 then the output should be as below;
CustName Country RecordedTime Audit History
----------------------------------------------------------------
Alex Australia 2018-Jun-01 08:00 AM ADD NEW
Alex Japan 2018-Jun-01 11:00 AM CHANGE CURRENT
John Australia 2018-Jun-01 08:00 AM ADD NEW
If give input date as 2018-Jun-02 then the output should be as below;
CustName Country RecordedTime Audit History
-----------------------------------------------------------------
John Australia 2018-Jun-01 08:00 AM CHANGE BEFORE
John China 2018-Jun-02 08:00 AM CHANGE CURRENT
Bob Australia 2018-Jun-02 09:00 AM ADD NEW
If give input date as 2018-Jun-03 then the output should be as below;
CustName Country RecordedTime Audit History
----------------------------------------------------------------
Bob Australia 2018-Jun-02 09:00 AM CHANGE BEFORE
Bob India 2018-Jun-03 12:55 AM CHANGE CURRENT
Any help is much appreciated.
Maybe you can use a solution like below See working demo
declare @d date='2018-Jun-03'
; with Indexer as
(
select
*,
rn= row_number() over(partition by CustName order by RecordedTime),
rn2=row_number() over(partition by CustName order by RecordedTime desc)
from records
)
,GetValidCustomerRecords as
(
select
CustName,
Country,
RecordedTime,
Audit = case when cast(RecordedTime as date)=@d and rn=1 then 'add' else 'change' end,
History = case
when cast(RecordedTime as date)=@d and rn=1
then 'new'
when cast(RecordedTime as date)<@d and rn=1
then 'before'
else 'current' end
from Indexer i
where CustName in
(
select
distinct CustName
from records
where cast(RecordedTime as date)=@d
)
and (rn=1 or rn2=1) and cast(RecordedTime as date)<=@d
)
select * from GetValidCustomerRecords
order by CustName, RecordedTime
来源：https://stackoverflow.com/questions/51039577/how-to-retrieve-data-from-sql-server-based-on-below-example