How to get current month from filename and bulk insert from text file into table?

Question

I set up some dynamic SQL to help my bulk copy data from a text file to a table.  This works fine for files that come in every day; I get the previous day’s data, based on the file name that’s placed
in the folder.  That’s why I’m using the ‘-1’.  The dates will look like this: '20140131', so I'm using type 112.
declare @fullpath1 varchar(1000)
select @fullpath1 = '''\\system.local\ms\london\FTP\' + convert(varchar, getdate()-1, 112) + '_INDEXPRICES_EOM.SPC'''
declare @cmd1 nvarchar(1000)
print (@cmd1)
select @cmd1 = 'bulk insert [dbo].[SB_Monthly] from ' + @fullpath1 + ' with (FIELDTERMINATOR = ''\t'', FIRSTROW = 5, LASTROW = 675, ROWTERMINATOR=''0x0a'')'
print(@cmd1)
exec (@cmd1)
I think the syntax will be somewhat similar to this:
YEAR(date_column)=YEAR(getdate()) AND MONTH(date_column)=MONTH(getdate())
I’m not totally sure how to incorporate that into my current syntax.
Knowledge is the only thing that I can give you, and still retain, and we are both better off for it.

Answer 1

I tried a couple versions of this.
Declare @StartDate Date, @EndDate Date
Select @StartDate = convert(varchar, getdate()-28, 112), @EndDate = convert(varchar, getdate()-1, 112)
BEGIN
declare @fullpath1 varchar(1000)
select @fullpath1 = '''\\ms\london\FTP\' + ''' between ''' + Convert(Varchar(10), @StartDate, 101) + ''' and ''' + Convert(Varchar(10), @EndDate, 101) + '''_SP.SPC'''
declare @cmd1 nvarchar(1000)
print (@cmd1)
select @cmd1 = 'bulk insert [dbo].[SPBMI_Monthly] from ' + @fullpath1 + ' with (FIELDTERMINATOR = ''\t'', FIRSTROW = 5, LASTROW = 675, ROWTERMINATOR=''0x0a'')'
print(@cmd1)
exec (@cmd1)
END
Here’s the string:
bulk insert [dbo].[SPBMI_Monthly] from '\\ms\london\FTP\' between '02/03/2014' and '03/02/2014'_SP.SPC' with (FIELDTERMINATOR = '\t', FIRSTROW = 5, LASTROW = 675, ROWTERMINATOR='0x0a')
The error message I keep getting is:
Msg 156, Level 15, State 1, Line 1
Incorrect syntax near the keyword 'between'.
Msg 319, Level 15, State 1, Line 1
Incorrect syntax near the keyword 'with'. If this statement is a common table expression, an xmlnamespaces clause or a change tracking context clause, the previous statement must be terminated with a semicolon.
I feel like I’m already pushing this thing to the limit. 
Maybe this last part isn’t possible.
Knowledge is the only thing that I can give you, and still retain, and we are both better off for it.