Divide sales by no of Days

Question

Hi friends, here is my task, appreciate your help.
Table_A:
Code
Date
111
1/1/2014
111
1/2/2014
111
1/3/2014
111
1/4/2014
111
1/5/2014
111
2/1/2014
111
2/2/2014
111
2/3/2014
111
2/4/2014
111
2/5/2014
Table_B:
Code
Jan
Feb
111
1000
2000
Need Result As:
Code
Date
SplitByNoOfWorkDays
111
1/1/2014
    200
111
1/2/2014
    200
111
1/3/2014
    200
111
1/4/2014
    200
111
1/5/2014
    200
111
2/1/2014
    400
111
2/2/2014
    400
111
2/3/2014
    400
111
2/4/2014
    400
111
2/5/2014
    400
Royal Thomas

Answer 1

;with cte1 as (select code, LEFT(datename(month, [date]),3) as [Mnth], count(*) as cntDays
from table_a GROUP by [code], datename(month, [date]),3),
cte2 as (select [code], [Mnth], [Days] from table_b UNPIVOT ([Days] for [Mnth] IN ([Jan],[Feb])) unpvt)
select T.[Code], T.[Date], c.SplitByNoOfWorkDays] from Table_A T inner join 
(select c1.*, cast(c2.[Days]/c1.[cntDays] as decimal(10,2)) as [SplitByNoOfWorkDays]
from cte1 c1 inner join cte2 c2 on c1.[code] = c2.[code] and c1.[Mnth] = c2.[Mnth]) c
on T.[code] = c.[Code] and left(datename(month,T.[Date]),3) = c.[Mnth]
From the top of my head and not tested. Also assumes you only have 1 year of data in the table. 
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