User manual

Table Of Contents
102 FileMaker Pro User’s Guide
For example:
Another example:
Self-joining relationships
A self-join is a relationship in which both match fields are defined in the same table. Define a self-join to create
relationships between records in the same table. Use a self-join in a portal on a layout of the current table to
display a subset of data that is in the current table, such as all the employees of each manager.
When you define a self-joining relationship in the relationships graph, FileMaker Pro generates a second
occurrence of the table upon which you are basing the self-join. FileMaker
Pro does this to prevent the
relationships graph from forming a cycle, which would make it impossible to evaluate the relationship.
This relationship returns related records in Table G when the value in Text Field G1 is the same as the value
in Text Field G2.
For more information about the types of relationships, see Help.
Planning a relational database
For information about planning a relational database, see “Planning a database” on page 51.
Working with the relationships graph
Use the relationships graph to create, change, and view the relationships in your database file. The relationships
graph lets you duplicate tables and relationships, resize and align tables, and add text notes. You can highlight
tables that are connected to the selected table via a 1-away relationship, and you can highlight tables that have
the same source table as the currently selected table. For more information, see Help.
If fields Contain values These related records are returned from Table F
Starting Date E 11/01/2010 11/14/2010
11/27/2010
Ending Date E 12/01/2010
If fields Contain values These related records are returned from Table F
Starting Date E 12/01/2010 12/02/2010
12/15/2010
12/17/2010
12/26/2010
Ending Date E 01/01/2011
Self-joining relationship
Match field
Match field