Selecting specific Data per month - sql

Question

So i have a table that would determine the Region Code of a Branch Depending on the Month,
Lets Say from January to february it's Region code would be 1, from February to March it would be 2 and for the month of april upto date would be 3
so here is the sample look of the table
i have a code that gets the data from a table, but what i want to achieve is that if the LoanDate of the selected Data is within the Dates above (between fld_Datefrom and fld_Dateto) it would use the fld_BranchRegion that is indicated like above above. (EG. the Loandate of the date is 2013-01-12 00:00:00 it would use the RegionCode 4A as indicated above and if the data is 2013-02-04 00:00:00 it would use the Region code 3
here is the code i use
SELECT
TE.LOAN
,bp.REGION
,BP.ID
,TE.AMOUNT
,te.ID
FROM #TrackExpired TE
inner join Transactions.TBLMAIN PM
on TE.ID = PM.ID
inner join #track BP
on BP.ID=cast(TE.ID/1000000000000 as decimal(38,0))
WHERE ((cast(TE.EXPIRATION as date) < cast(TE.newloandate as date))
OR(TE.NewLoanDate is null and (cast(TE.EXPIRATION as date) < cast(PM.REDEEMED as date))) or ((TE.NewLoanDate is null and PM.REDEEMED is null) and (PM.STATUS = 7 or PM.STATUS = 5)) )
The problem with this is that it generates duplicate values so i have 3 occurances of the dates in the #track table the number of the Data is also outputted 3 times with different Region Code!!
Instead of outputting them i would like to achive on selecting the Region Code from **#track
Based on the loan date of the Data.**
i just want to achieve that instead of outputting all of the region code, it would just use the Region code that is between the ranges based on the #track table provided..
Any Help? or other approach?? thank you!. sorry im new to SQL.
EDIT here is the code to create the temp tables.
#trackexpired
SELECT PH.ID
,PH.LOAN
,PH.EXPIRATION
,PH.AMOUNT
,(SELECT T3.LOAN FROM Transactions.HISTO T3 INNER JOIN
(
SELECT MIN(T2.ID) as pawnhisto
FROM Transactions.HISTO T2
WHERE T2.ID > PH.ID
AND PH.ID = T2.ID
) T4
ON T4.pawnhisto = T3.ID
)as 'NewLoanDate'
INTO #TrackExpired
FROM Transactions.HISTO PH
INNER JOIN Transactions.MAIN PM
ON PM.ID=PH.ID
WHERE YEAR(PH.LOAN) = #YEAR
#track
Select bt.CODE
,bp.ID
,AREA
,REGION
,NCODE
,FROM
,isnull(fld_Dateto,GETDATE()) as fld_Dateto
into #sort
from Transactions.tbl_BranchTracking bt
inner join Reference.tbl_BranchProfiles bp
on bt.CODE = bp.CODE
Select * into #track from #sort
where #YEAR >= year(FROM)
and
#YEAR <= year(fld_Dateto)

Answer 1

Test Data
create table #LoanTable (
ID int not null,
RegionCode nvarchar(50) not null,
LoanDate datetime not null
);
insert into #LoanTable values
(1,'5','10/01/2014'),
(2,'5','10/18/2014'),
(3,'5','10/02/2014'),
(4,'3','04/11/2014'),
(5,'3','04/05/2014'),
(6,'4A','01/09/2014'),
(7,'4A','01/05/2014')
create table #LoanDetailsTable (
ID int not null,
LoanAmount INT not null,
LoanDate datetime not null
);
insert into #LoanDetailsTable values
(1,5000,'10/15/2014'),
(2,1000,'10/11/2014'),
(3,2000,'10/09/2014'),
(4,1500,'04/13/2014'),
(5,5000,'04/17/2014'),
(6,500,'01/19/2014'),
(7,2500,'01/15/2014')
Query
;With RegCode
AS
(
SELECT RegionCode, MAX(MONTH(LoanDate)) [Month]
FROM #LoanTable
GROUP BY RegionCode
)
SELECT LDT.* , RC.RegionCode
FROM #LoanDetailsTable LDT INNER JOIN RegCode RC
ON MONTH(LDT.LoanDate) = RC.[Month]
Results
ID LoanAmount LoanDate RegionCode
1 5000 2014-10-15 00:00:00.000 5
2 1000 2014-10-11 00:00:00.000 5
3 2000 2014-10-09 00:00:00.000 5
4 1500 2014-04-13 00:00:00.000 3
5 5000 2014-04-17 00:00:00.000 3
6 500 2014-01-19 00:00:00.000 4A
7 2500 2014-01-15 00:00:00.000 4A
Using CTE extract the Month part of the date along with Region Code associated with it, then join it with you data table on Month of the loan date and extracted month in cte and get the Region code whatever it is at that time. happy days :)