topic Re: what is differences between qvd and qvw in QlikView

what is differences between qvd and qvw

Thu, 16 Apr 2015 11:37:18 GMT

pls tell about clear differences about qvd and qvw

Re: what is differences between qvd and qvw

Peter_Cammaert — Thu, 16 Apr 2015 11:39:55 GMT

This question has been asked before about a hundred times. Search the community if you want more information.

QVD = QlikView Data File. Contains a single internal table, loads extremely fast

QVW = A QlikView BI document. Contains everything: Load script, User Interface, data, associations, security etc. This is what you and your end-users will be working with.

Re: what is differences between qvd and qvw

maleksafa — Thu, 16 Apr 2015 11:40:35 GMT

the qvd represents the data file, so when you pull data from any data source (excel, files, database) you can store them in a qvd.

the qvw is the actual dashboard, where you put all your charts. and typically the qvw reads the data from a qvd.

Re: what is differences between qvd and qvw

buzzy996 — Thu, 16 Apr 2015 11:41:39 GMT

qvd (qlikview data file): is exported file from qvw.

qvw(qlikview work bench),we can design front end on this file.

Re: what is differences between qvd and qvw

awhitfield — Thu, 16 Apr 2015 13:23:14 GMT

Hi Kumar,

QVW- QlikView document is a file containing everything needed to analyze the data:

the data itself

the script needed to update the QlikView file with new data from the data source

layout information, including all the sheets, list boxes, charts, etc.

document alerts, document bookmarks and document reports

access restriction information

macro module

it is thus very easy to distribute

A QVD (QlikView Data) file is a file containing a table of data exported from QlikView. QVD is a native

QlikView format and can only be written to and read by QlikView. The file format is optimized for speed

when reading data from a QlikView script but it is still very compact. Reading data from a QVD file is typically

10-100 times faster than reading from other data sources.

QVD files can be read in two modes: standard (fast) and optimized (faster). The selected mode is determined

automatically by the QlikView script engine. Optimized mode can be utilized only when all loaded fields

are read without any transformations (formulas acting upon the fields), though the renaming of fields is

allowed. A WHERE clause causing QlikView to unpack the records will also disable the optimized load.

A QVD file holds exactly one data table and consists of three parts:

1. A well formed XML header (in UTF-8 char set) describing the fields in the table, the layout of

the subsequent information and some other meta-data.

2. Symbol tables in a byte stuffed format.

3. Actual table data in a bit-stuffed format.

28.1 Purpose of QVD Files

QVD files can be used for many purposes. At least four major uses can be easily identified. More than one

may apply in any given situation:

Regards

Andy

Re: what is differences between qvd and qvw

Thu, 16 Apr 2015 13:29:54 GMT

Hi Rahul,

The file type that is created using the QlikView Desktop/Personal Edition is known as a QVW (.qvw, or QlikView file).

Upon reload, a QVW can be used to create a data-only QVD (QlikView data) file, which is binary and contains no UI.

Regards,

Harsha