i need to know what database Quickbooks use ?

Do you need to export data out to XLS or integrate to another app?

Integrate with other app this app need to access the database

Thank you for reaching out to us, @A7med.

Let me share with you the apps that you can use to pull some data.

QuickBooks have supported third-party apps that can help you with your business. I'd recommend you check apps for QuickBooks Desktop and look for the best app that suits your need.

To integrate QuickBooks data into another app, it would be best to contact the app provider and ask them to reach out to the Developer team in order for the app to be integrated.

Here's how to contact them:

1. Go to https://desktop.apps.com/home.
2. Locate the app.
3. In the upper right of your screen, look for the contact number of the developer.

For future reference, I would also recommend you check our Help article. This can help you resolve issues with your QuickBooks account.

Feel free to reach back out to me if I can be of more help with integrating data. I'll make sure to get back to you as soon as I can. 

@A7med 

Which app do you need to integrate with QB Desktop? a CRM app or else? You will need a connector to do so.

well actually its custom application that need to connect to database so i was asking about possibility to extract the data From Company File to access database for example and connect to this database.
i saw QODBC that can do this but i don't know how it exactly work and iam not sure that it will get all data from quickbooks correctly.
thanks in advance 

well actually it's custom App which connect direct to database so i asked what database Quickbooks use, i found that its integrated in company file itself, 
i saw QODBC that can pull data from company file and it can link it to Microsoft Access database but i dont know how it work and i'm not sure if it retrieve all data correctly.
thanks in advance

Ask your app developer to visit another community

https://developer.intuit.com/app/developer/homepage

Otherwise, utilize an exporter tool to export data out to XLS.

https://transactionpro.grsm.io/qbd