qvd

Thu, 16 Apr 2015 11:23:29 GMT

what is qvd and and what r ways to create it.....

Re: qvd

sebastianlettner — Thu, 16 Apr 2015 11:27:23 GMT

Hi,

take a look at

QVD, QVW and QVX

Creating QVD's

Re: qvd

Gabriel — Thu, 16 Apr 2015 11:35:05 GMT

Hi,

QVDs are QlikView Data file, it can be created and can only be read by qlikview. Imagine this as .xls filename extension. It's optimized for load 10-100 faster than any other load from source.

QVDs can only be created by qlikview either using STORE xxx INTO c;\\.....xxx.qvd(qvd);

Or through the use of BUFFER statement before LOAD.

Hope this helps

Re: qvd

Thu, 16 Apr 2015 11:41:47 GMT

Hi Rahul,

You can use QV help file. It has comprehensive answer to both of your questions.

Thanks!

Re: qvd

arulsettu — Thu, 16 Apr 2015 11:43:09 GMT

to create QVD for example

Student:

load

name,

roll num,

mars

from.....

store Student into C:\Program Files\qlikview\Student.qvd(qvd);

Re: qvd

awhitfield — Thu, 16 Apr 2015 15:01:24 GMT

Hi Kumar,

You should look at the Qlikview Reference Manual, there is a whole section on QVD files

What is it?

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.

How to Create It?

1. Explicit creation and naming using the Store (page 278) command in the QlikView script.

2. Automatic creation and maintenance from script. By preceding a load or select statement with

the Buffer (page 225) prefix, QlikView will automatically create a QVD file which under certain

3. Explicit, manual creation and naming from layout or via Internal Macro Interpreter (page

897). Data can be exported from the QlikView layout via GUI commands or Automation macros.

In the GUI you will find QVD as one of the possible export formats under the Export...

Regards

Andy

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