Skip to main content
Qlik Introduces a New Era of Visualization! READ ALL ABOUT IT
Showing results for 
Search instead for 
Did you mean: 

Difference between Write back and Incremental Load


Help me to understand the difference between incremental load and write back extension?? 

Incremental load is use to load the table only with the new data whereas write back extension is moreover same but here update is  done while creating a sheet or visualization.

I want to know why we write back when incremental load is already there? Will the write back works without applying incremental load to the app? and on what basis, a developer updating the data using write back extension, where is the data source??? If a developer updating the data using write back extension based on the new values why not just apply the incremental load and done with it??

Have a good day.


Labels (4)
1 Reply

Hey there,

Incremental load and write-back extensions serve different purposes in Qlik Sense.


Incremental load is a technique used to load only new or changed data from a data source into a Qlik Sense app. This can improve the performance of data reloads by reducing the amount of data that needs to be loaded. Incremental load is typically used when loading large amounts of data from a data source that changes frequently.


Write-back extensions, on the other hand, allow users to enter or update data directly within a Qlik Sense app. This data is then saved to an external data source, such as a database or a file. Write-back extensions are typically used to support planning, forecasting, and other scenarios where users need to enter or update data within the app.


The main difference between incremental load and write-back extensions is the direction of the data flow. Incremental load is used to load data from an external data source into a Qlik Sense app, while write-back extensions are used to save data from a Qlik Sense app to an external data source.

Write-back extensions can be used independently of incremental load. The data source for a write-back extension is determined by the extension itself and can be different from the data sources used for loading data into the app.

Please do refer to these links for more information

Loading new and updated records with incremental load | Qlik Sense on Windows Help

Writeback extension - Qlik Community - 2030145