Kubuntu no longer ships with a default database application, however you have options in which to choose from.
OpenOffice.org Base is de databasetoepassing die door dezelfde groep is gemaakt als die de OpenOffice.org suite maakt. OpenOffice.org Base zit in de Main-pakketbron. Zie Toepassingen installeren voor hulp bij de installatie hiervan.
Kexi is also a 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 Adding Applications documentation for help on installation.
It is recommended you try both applications in order to see which one works best in your situation.