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Prospective Users  -  Creating Databases Using JFile

JFile is a fast, efficient, and user friendly database program for the Palm OS Platform. New features include an advanced filtering screen, categorization of databases, printing via PalmPrint, font choices, scrollbars for fast navigation, and more. Included with JFile is a PC based application that can convert Comma Separated Value (.csv) files to and from JFile .pdb format databases.


Creating a new database
  Figure 1: Click the New DB Button 
  1. Power up your PDA and select JFile Pro from the application launcher.
  2. Tap the 'New DB' button (see figure 1). You will be taken to the New/Modify Database View, where you can set up or make changes to the databases field names, field types, and the database name itself.
  3. Enter the name of the database at the top of the screen, which can be up to 30 characters in length.
  4. The next step is to select the field names for each record and the field types. The field names can be up to 20 characters each in length (see figure 2). You may choose a different Field Type for each field (see figure 3). To the right of the field type column, you will see a '?' for certain field types. Tapping this will allow you to choose among variations of that particular field types. The field types are listed below:
  • String: this is the 'normal' field type allowing strings of up to 4000 characters to be entered in the field list. For very long text fields, easy editing and viewing of the field is possible by clicking on the field name in the record view. This will cause a popup edit box to appear that will allow complete and easy access to the string field's data.
  • Bool: this is the Boolean type of field type, and will appear in your databases as a checkbox that is either checked or unchecked.
  • Date: this is the Date type of field type, and will popup a Date picking dialog box when you click on the name of the field. Once you select date as your field type, a question mark will popup to the right of the field type column. Tapping on this question mark will allow you to pick between three variations. First, the Normal Date is a date field that will be initially left blank and allows you to pick any date that you choose. Second, the Creation Date is a date field that automatically fills in the date the record was created. Third, the Modification Date is the date field that will automatically insert the time the record was last modified.
  Figure 3: Pick Your Field Type 
  • Time: this is the Time type of field type, and will popup a Time picking dialog box when you click on the name of the field. Once you select time as your field type, you will again see the question mark to right of the field type column. Tapping on this question mark will allow you to pick between three variations. First, the Normal Time is a time field that will be initially left blank and allows you to pick any time that you choose. Second, the Creation Time is a time field that will automatically insert the time the record was created. Third, the Modification Time is a time field that will automatically insert the time the record was last modified.
  • Popup: this is an extremely useful field. It allows you to create a list of choices that you can pick from and allows you to quickly insert pieces of data into your database. You can define the contents of the popup list once you have created the database. Popup lists are not intended to be used for very long lists of data. There are limitations in JFile Pro that limit each Popup List to 100 items, and each list is limited to approximately 2000 characters of data. Once you select Popup as your field type, you will again see the question mark to the right of the field type column. Tapping on this question mark will allow you to pick between two variations. First, the Normal Popup replaces the data for the field completely with the text from the popup choice. Second, the Multiple Popup will allow you to add more than one choice from the Popup list to the data field.
  • Int: this is the Integer field type. Once again, a question mark will appear to the right of the field type column. Tapping on this question mark will allow you to pick between two variations. First, the Normal Integer allows you to enter any integer you choose. Second, the Auto-Increment Integer will automatically fill with the value of the 'Starting Number' that you choose and then each time a new record is created, the counter is bumped up (or down for negative numbers) by the amount of the 'Increment Amount'.
  • Float: this is the Floating Point field type. This type allows you to input decimals. Sorting on this field will be valid for integers up to approximately 9 digits in length.
  Figure 4: The Main Screen 
  1. Now that you have named your fields and chosen your field types, tap done to return to the main screen. If you ever want to modify the choices you have made, tap modify on the main screen, which will then become highlighted, and then pick the database you wish to modify.
  2. You're done. On the main screen, tap on the name of the database you just created and you will be able to begin adding information.

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