How To add a qvd in another qvd after every 28 Days

[Anonymous]

Hi,

I m new in qlikview . please help me to solve this problem.

suppose I have 2 qvds 'New Report'  &  'Old Report'   with 2 fields model code  & code . 'old report'  is to be appended after every 28 days in new report .

I Tried to use QvdcreateTime()    to take first qvd date when created.

.

let vSaveQVD = 'D:\Qlikview Development\000 Training\Apoorva\Practice Front End\Incremental Load\Stage1\QVD\' ;
let vQVDCreateDate = QvdCreateTime('$(vSaveQVD)OldReport.qvd');
let vQVDDate= Date('$(vQVDCreateDate)');
LET vCurrentDate = date(Today()-28,'DD/MM/YYYY');

NewReport:
LOAD Code,
ModelCode
  FROM
[..\..\Stage1\QVD\NewReport.qvd](qvd);

if ('$(vCurrentDate)' = date('$(vQVDDate)'+28,'DD/MM/YYYY'))
Concatenate
Incremental:
LOAD Code,
ModelCode

FROM
[..\..\Stage1\QVD\OldReport.qvd](qvd);

let vQVDDate = date(('$(vQVDDate)'+28),'DD/MM/YYYY');