The document contains code for different buttons that perform database operations on a table called NASABAH. The buttons include:
- Button tambah which inserts a new record into the NASABAH table if the NO_REK value is not already present.
- Button hapus which deletes a selected record from the NASABAH table after asking for user confirmation.
- Button update which updates an existing record in the NASABAH table.
- Other buttons like keluar to close, cari to search, and clear to clear fields.