For every Table that you create, one of the Fields in the Table must be set as the Table Reference Field. The Reference Field contains the unique identifiers for each Record in the Table.
For example, you may have a Table called Projects where each Project has a Name. You can set the Name Field to be the Reference Field for Projects. This means that every Project must have a Name specified and each must have a different Name.
This will allow you to identify exactly which Record in the Projects Table is which as every Record will have a different Name.
Reference Fields are important when you start creating relationships between Tables.
To continue the example above, the Projects Table could have a linked child Table called Tasks where one Project has many child Tasks.
When you are creating a Task and choosing which Project to link it to, you will choose from a list of Project Names since the Name Field was set as the Reference Field.
If instead you had selected the Start Date Field to be the Project Reference Field, a list of dates would be shown in the Project list.
The ideal Reference Field for a Table is one where:
The Field Types that can be set as a Reference Field are: Text, Text Area, Rich Text, Number, Money, Date, Date Time, Auto Counter, and URL.
For each of your Tables, look through each of the Fields which match one of the above Types and determine if every Record in the Table will have a unique value set for all Records.
If there are no Fields which are unique and required on the Table, then you can add an Auto Counter Field. This will create a sequence of numbers for each Record in the Table which will always be unique and always be set. You can then add an ID Mask to the Reference Field so that it is easier for your Users to identify the Record.
Once you have created a new Table, before you can save the Table you must specify a Reference Field.
You can specify the Reference Field for a Table using either the Screen Editor or the Explorer. Select Edit This Screen or click the Explorer tab, then click on the Field to open up the left hand configuration panel. Check the Is Reference checkbox.
You can then save the Table.
If you haven’t chosen a Reference Field for a new Table, when you click Save you will be prompted to select a Reference Field. You can choose an existing field or alternatively, you can click the Add new Auto Counter Field option which will create a new Auto Counter Field on the Table and set it as the Reference Field. Use this option if none of the existing Fields are suitable as a Reference Field.
The Reference Field for a Table can be changed at any time. You will need to ensure that all existing Records in your Table have a value set in the new Reference Field.
To change the Reference Field for a Table, repeat the steps above to check the Is Reference checkbox for the Field. This will swap the Reference Field from the previously selected Field to the new Field.
When a new Reference Field is selected, the old Reference Field will remain unique and required. To change this, open the Field Configuration for the old Reference Field and uncheck the Is Required and Is Unique options as needed.