SQL Server : prevent output of tablename with date later then today - sql

Question

I am trying to display data with 11 months from 11 tables. Each table containing a different months data. The table name contains the date of each table. At the moment my code works in a way that a person has to input a date such as 201404 then it will display all months from 201404 right up to 201503. I need to put a check in place so that if the person types in 201507 it only throws out 201507 up to 201510 as the remaining months do not exists as yet.
This is my code:
alter PROCEDURE stp3
#FirstTableMonth int =0,
#EndMonth datetime
AS
DECLARE
#LinkedServerName sysname = 'SERVER1',
#left int = 0,
#right int= 0,
#STRING VARCHAR(6),
#monthex int = 12,
#yearex int,
#yearstring int,
#DynamicSQL nvarchar(max) = '',
#DynamicSQL2 nvarchar(max) = '',
#OpenQuerySql nvarchar(max),
#Table_Name sysname,
#Table_Name2 sysname,
#TableMonth int,
#TableMonth2 int ,
#CurrentMonth int = 0,
#NextYearMonth int = 1,
#part2 nvarchar(max) = '',
#TwelfthMonth int = 0;
SET #FirstTableMonth= CAST(#FirstTableMonth AS VARCHAR(6))
set #left = cast(left(#FirstTableMonth,4) +1 as varchar(max))
set #right = right(#FirstTableMonth,2) - 1
set #monthex = 11
set #yearex = cast(left(#FirstTableMonth,4) as varchar(max))
set #yearstring = case when right(#FirstTableMonth,2) = '01' then left(#FirstTableMonth,4) + RIGHT( #monthex + LTRIM( RTRIM( right(#FirstTableMonth,2) ) ), 6 ) else #left end
SET #STRING =
case when right(#FirstTableMonth,2) = '01' then #yearstring
when #right < 10 then CAST(#left AS VARCHAR(4)) + RIGHT( '0' + LTRIM( RTRIM( #right ) ), 6 )
else CAST(#left AS VARCHAR(4)) + RIGHT( LTRIM( RTRIM( #right ) ), 6 ) end
WHILE #CurrentMonth < 11 AND #EndMonth < getdate()
BEGIN
SELECT #TableMonth = CASE WHEN (#FirstTableMonth + #CurrentMonth) % 100 < 13 THEN
#FirstTableMonth + #CurrentMonth
ELSE
#FirstTableMonth + 100 - (#FirstTableMonth % 100) + #NextYearMonth
END,
#NextYearMonth = CASE WHEN (#FirstTableMonth + #CurrentMonth) % 100 < 13 THEN
#NextYearMonth
ELSE
#NextYearMonth + 1
END,
#Table_Name = 'XX_'+CAST(#TableMonth as varchar)+'_T' ,
#TableMonth2 = #TableMonth,
#Table_Name2 = 'XX_'+CAST(#TableMonth2 as varchar)+'_T' ,
#DynamicSQL = #DynamicSQL +
'SELECT
*
FROM '+ #Table_Name + '
'+ CASE WHEN #CurrentMonth < 10 THEN ' UNION ALL ' ELSE '' END ,
#DynamicSQL2 = #DynamicSQL2 +
'SELECT
*
FROM '+ #Table_Name2 + '
'
SET #CurrentMonth = #CurrentMonth + 1
IF OBJECT_ID('tempdb..#TEMP') IS NOT NULL BEGIN DROP TABLE #TEMP END
IF OBJECT_ID('tempdb..#Unioned') IS NOT NULL BEGIN DROP TABLE #Unioned END
--last months snapshot
SELECT
*
INTO #UNIONED
FROM OPENQUERY(SERVER1,' SELECT
*
FROM yy_T
'
)
union all
SELECT
*
FROM OPENQUERY(SERVER1,' SELECT
*
FROM yk
'
)
DECLARE #dateAsNumber VARCHAR(8);
SET #dateAsNumber = CONVERT(CHAR(6),GETDATE(), 112);
DECLARE #DateConvertedFromNumber DATETIME;
SELECT #DateConvertedFromNumber = CONVERT (DATETIME, CONVERT(CHAR(8), #dateAsNumber + '01'))
select
*
LEFT(CONVERT(VARCHAR, DATEADD(MONTH, -1,#DateConvertedFromNumber), 112),6) AS 'Period'
INTO #temp
from #Unioned
drop table OpenQTable
--if equal to month + 99 = previous month then union 11 tables with last months snapshot
--else
--union 11 tables with 12th table
SET #OpenQuerySql = 'IF (' + cast(#FirstTableMonth as varchar) + '+99) = CONVERT(nvarchar(6), dateadd(month,-1,GETDATE()), 112)
BEGIN
SELECT *
FROM OPENQUERY(['+ #LinkedServerName +'], '''+ #DynamicSQL + ''' )
UNION ALL
SELECT *
FROM #temp
END
else
begin
SELECT *
FROM OPENQUERY(['+ #LinkedServerName +'], '''+ #DynamicSQL + ''' )
UNION ALL
SELECT *
FROM OPENQUERY(['+ #LinkedServerName +'], '''+ #DynamicSQL2 + ''' )
end
'
END
insert into OpenQTable
EXECUTE sp_executesql #OpenQuerySql
go
}