One-to-many relationship between tables

Application configuration > Data model editor > One-to-many relationship between tables

A table can have relation with other tables, through fields of the type Relation. The table where the Relation field is created, is known as child table and is subordinated to (i.e., points to) another table, known as parent table or target table.

The simplest way to represent a relationship between tables is by adding the Relation field to a section of the child table, i.e., many children with one parent, also called many-to-one:

But this relation can also be represented the other way around, that is from a section of the parent table showing a list of his/her children, i.e., one parent with many children, one-to-many:

The above is accomplished by creating a section (any type) of the parent table and adding (inside or outside its panel) a Table section of the child table that depends on the parent.

It is important to note that the one-to-many relationship can also be displayed by using the Multi-value field to show a quick list of the child records, but also convenient for deleting child records permanently, just by clicking their crosses and save (for further functionality you might need more advice from IS Tools support):

For that, once you have selected the parent table in Form designer, look for the reverse relation icon and click on it to display an additional panel where fields of the child table are listed, including the System defined fields, from where the Record name can be added. Other fields from the reverse relation panel can also be added.

Read more about relation between tables here.