
Kubuntu does not ship with a default database application. However, there are options to choose from.
LibreOffice Base is the database that is a part of the LibreOffice suite. Base is in the Main repository. Please refer to the Software Management In Kubuntu documentation for help with installation.
Kexi is another choice for a database application. Kexi is part of the KDE KOffice suite and tends to integrate better within KDE. Kexi is in the Main repository. Please refer to the Software Management In Kubuntu documentation for help with installation.
Note
It is recommended to try both database applications in order to see which works best in a given situation.