The DB3 file will contain the database structure as well as all data records contained within. The Db3 file is used for storing and retrieving structured data using SQL. PalmDatabase.db3, is a common implementation of DB3, which stores personal information on the Palm Pre, including contacts, account information, and call logs. The from_csv method is only intended to dump into Memo fields. If you want more control then you should skip the csv step and go from xls to dbf, using xlrd and dbf. It will take a little more work: You'll have to create the table first with the appropriate fields, but then it's a simple matter of iterating through the xls table and writing to the dbf table.
![How to open a db3 file How to open a db3 file](http://www.sqlitetutorial.net/wp-content/uploads/2016/05/SQLite-Import-csv-to-table-Step-1.png)
Convert DBF to CSV DBF Converter allows you convert a single dbf file or folder with dbf files to csv format from GUI or command line. Select the dbf file or foder with dbf files for batch conversion. Select the output csv file or folder for csv files for batch conversion. Preview, select options for sorting, filtering data (if necessary) You can also select/unselect columns, set order for columns.