Convert Month to Range of Dates

Question

Hi All,
I need help it writing a T-SQL which converts a single month into the all the dates of that month.
I tried and tried, and  nothing came to my brain. I need from experts like you.
Table Data
P_Status
Month Daily Prod
Unit
Jan-14 1
4
Feb-14 3
6
The output needs to be like this 
Month Daily Prod
Unit
1/1/2014 1
4
1/2/2014 1
4
1/31/2014 1
4
2/1/2014 3
6
2/2/2014 3
6
2/28/2014 
3 6
Thanks in advance.

Answer 1

if you can't (or don't want to) create a calendar table (you should, its super helpful) then you could use this function instead:
create function Dates(@date datetime)
returns @table table
now datetime,
today datetime,
Month_start datetime,
Month_end datetime,
Prev_Month_Start datetime,
Prev_Month_End datetime,
Week_Start datetime,
Week_End datetime,
Prev_Week_Start datetime,
Prev_Week_End datetime,
Quarter_Start datetime,
Quarter_End datetime,
Prev_Quarter_Start datetime,
Prev_Quarter_End datetime,
Year_Start datetime,
Year_End datetime,
Prev_Year_Start datetime,
Prev_Year_End datetime,
Month_End_TS datetime,
Prev_Month_End_TS datetime,
Week_End_TS datetime,
Prev_Week_End_TS datetime,
Quarter_End_TS datetime,
Prev_Quarter_End_TS datetime,
Year_End_TS datetime,
Prev_Year_End_TS datetime,
Year smallint,
Month smallint,
Day smallint,
Month_Name varchar(15),
Day_Name varchar(15),
WD smallint
as
begin
if @date IS NULL set @date = getdate()
insert into @table
select
@date as now,
convert(datetime,convert(varchar,@date,101)) as today,
dateadd(day,0-day(@date)+1,convert(datetime,convert(varchar,@date,101))) as Month_Start,
dateadd(day,-1,dateadd(month,1,dateadd(day,0-day(@date)+1,convert(datetime,convert(varchar,@date,101))))) as Month_end,
dateadd(month,-1,dateadd(day,0-day(@date)+1,convert(datetime,convert(varchar,@date,101)))) as Prev_Month_start,
dateadd(day,-1-day(@date)+1,convert(datetime,convert(varchar,@date,101))) as Prev_Month_End,
dateadd(day,1-datepart(dw,@date),convert(datetime,convert(varchar,@date,101))) as Week_Start,
dateadd(day,7-datepart(dw,@date),convert(datetime,convert(varchar,@date,101))) as Week_End,
dateadd(day,-6-datepart(dw,@date),convert(datetime,convert(varchar,@date,101))) as Prev_Week_Start,
dateadd(day,0-datepart(dw,@date),convert(datetime,convert(varchar,@date,101))) as Prev_Week_End,
convert(datetime,convert(varchar,year(@date)) +'-'+ right('0'+convert(varchar,((datepart(QUARTER,@date)-1)*3)+1),2)+'-01') as quarter_start,
dateadd(day,-1,dateadd(quarter,1,convert(datetime,convert(varchar,year(@date)) +'-'+ right('0'+convert(varchar,((datepart(QUARTER,@date)-1)*3)+1),2)+'-01'))) as quarter_end,
convert(datetime,convert(varchar,year(dateadd(quarter,-1,@date))) +'-'+ right('0'+convert(varchar,((datepart(QUARTER,dateadd(quarter,-1,@date))-1)*3)+1),2)+'-01') as prev_quarter_start,
dateadd(day,-1,dateadd(quarter,1,convert(datetime,convert(varchar,year(dateadd(quarter,-1,@date))) +'-'+ right('0'+convert(varchar,((datepart(QUARTER,dateadd(quarter,-1,@date))-1)*3)+1),2)+'-01'))) as prev_quarter_end,
dateadd(day,1-day(@date),dateadd(month,1-month(@date),convert(varchar,@date,101))) as Year_Start,
dateadd(year,1,dateadd(day,0-day(@date),dateadd(month,1-month(@date),convert(varchar,@date,101)))) as Year_End,
dateadd(year,-1,dateadd(day,1-day(@date),dateadd(month,1-month(@date),convert(varchar,@date,101)))) as Prev_Year_Start,
dateadd(year,-1,dateadd(year,1,dateadd(day,0-day(@date),dateadd(month,1-month(@date),convert(varchar,@date,101))))) as Prev_Year_End,
dateadd(ms,-3,dateadd(day,0,dateadd(month,1,dateadd(day,0-day(@date)+1,convert(datetime,convert(varchar,@date,101)))))) as Month_End_Ts,
dateadd(ms,-3,dateadd(day,-1-day(@date)+2,convert(datetime,convert(varchar,@date,101)))) as Prev_Month_End_TS,
dateadd(ms,-3,dateadd(day,8-datepart(dw,@date),convert(datetime,convert(varchar,@date,101)))) as Week_End_TS,
dateadd(ms,-3,dateadd(day,1-datepart(dw,@date),convert(datetime,convert(varchar,@date,101)))) as Prev_Week_End_TS,
dateadd(ms,-3,dateadd(day,0,dateadd(quarter,1,convert(datetime,convert(varchar,year(@date)) +'-'+ right('0'+convert(varchar,((datepart(QUARTER,@date)-1)*3)+1),2)+'-01')))) as quarter_end_TS,
dateadd(ms,-3,dateadd(day,0,dateadd(quarter,1,convert(datetime,convert(varchar,year(dateadd(quarter,-1,@date))) +'-'+ right('0'+convert(varchar,((datepart(QUARTER,dateadd(quarter,-1,@date))-1)*3)+1),2)+'-01')))) as prev_quarter_end_TS,
dateadd(ms,-3,dateadd(year,1,dateadd(day,1-day(@date),dateadd(month,1-month(@date),convert(varchar,@date,101))))) as Year_End_TS,
dateadd(ms,-3,dateadd(day,1-day(@date),dateadd(month,1-month(@date),convert(varchar,@date,101)))) as Prev_Year_End_TS,
Year(@date) as Year,
Month(@date) as Month,
Day(@Date) as Day,
datename(month,@Date) as Month_Name,
datename(WEEKDAY,@date) as Day_Name,
datepart(weekday,@date) as WD
return
end
go
select * from dbo.Dates(getdate())
go
drop function dbo.dates