Getting a list of all months between 2 DATE columns for a table

Question

Current set:
IF OBJECT_ID('tempdb..#TEST') IS NOT NULL
DROP TABLE #TEST
CREATE TABLE #TEST
ID INT,
DOB DATE,
EffectiveDate DATE,
TerminationDate DATE,
GCode CHAR(1)
INSERT INTO #TEST
VALUES
(1043,'1/1/1970','1/1/2014','4/1/2014','S'), -- Active in month Jan,Feb,March,April
(1051,'1/1/1989','3/1/2014','5/1/2014','P'), -- Active in month March,April,May
(1070,'1/1/2010','5/1/2014','8/1/2014','G') -- Active in month May,June,July,August
SELECT * FROM #TEST
Expected result set:
ID          Month         GCode
1043      January      S
1043      February    S
1043      March         S
1043      April           S
1051      March        P
1051      April          P
1051      May          P
---- Similarly for ID 1070
This is needed for the reporting and each ID will have points associated to it, that will be a separate column that I'll be adding. The reason that I want this result set is because, the user might say, how many points did the ID have for a particular month.
The points are not going to change for an ID. Please let me know how to get the expected result set

Answer 1

Try
-- code #1
set LANGUAGE English;
set dateformat MDY;
declare @Month table (N int, T varchar(20));
declare @I int, @D date;
set @I= 1;
set @D= '1/1/2014';
while @I <= 12
begin
INSERT into @Month values (@I, DateName(month, @D));
set @I+= 1;
set @D= DateAdd(month, +1, @D);
end;
SELECT ID, T, GCode
from @Month as M inner join
#TEST as T on M.N between Month(EffectiveDate) and Month(TerminationDate)
order by ID, N;
José Diz     Belo Horizonte, MG - Brasil