Kubuntu no longer ships with a default database application, however you have options in which to choose from.
OpenOffice.org Base는 OpenOffice.org 스위트와 같은 그룹에서 작성된 데이터베이스 프로그램입니다. OpenOffice.org Base는 Main 저장소에 포함되어 있습니다. 설치에 대한 도움말은 프로그램 추가 문서를 참조하기 바랍니다.
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.