IF OBJECT_ID('TempDb..#Table_Numbers') IS NOT NULL
DROP TABLE #Table_Numbers

CREATE TABLE #Table_Numbers(val INT)

DECLARE @str AS VARCHAR(MAX)
SET @str = '1,2,3,50,90'
SET @str = 'SELECT ' + REPLACE(@str,',',' UNION ALL SELECT ')

INSERT INTO #Table_Numbers
EXEC (@str)
-- ####################################

DECLARE @Int_Value varchar(8000), @SQLCMD varchar(8000);

DECLARE Values_Cursor CURSOR READ_ONLY FOR
SELECT t.val FROM #Table_Numbers as t

OPEN Values_Cursor;
FETCH NEXT FROM Values_Cursor into @Int_Value;
WHILE @@FETCH_STATUS = 0
   BEGIN
set @SQLCMD='SELECT * FROM Some_Table WHERE id = @' + @Int_Value +''

print @SQLCMD;
--exec (@SQLCMD);
      FETCH NEXT FROM Values_Cursor into @Int_Value;
   END;
CLOSE Values_Cursor;
DEALLOCATE Values_Cursor;
GO