Relations

Relations between tables are used to associate rows in one table to rows in
another table.
Relations are also used to:• Enforce business rules across tables• Create auto joins in forms (join one table to another table).• Look up values in other tables (using lookups and the View Details
command).• Validate data by providing constraints.• Automatically propagate changes from one table to another by
defining cascading relations.• Generating field help (hover over a field, and data from the related
table is displayed).
Relationships can be created between tables using MorphX.• These relations are defined within the Microsoft Dynamics AX
application and not at the physical database level.• Relations govern the relationships between data in different tables
such as foreign key relationships.• Foreign key relationships between tables are always formed from the
parent table.
Under the relations node you can create different types of relationships between
the parent table and other tables in Microsoft Dynamics AX.• Normal specifies related fields in another table. Multiple fields can
be included in this relation. For example, table
LogisticsPostalAddress has a relation called State that defines the
relation to the LogisticsAddressState table. The values allowed in the
state field are limited depending on which country is entered.• Field fixed specifies related fields that restrict the records in the
primary table. The fixed field is normally an enum.• Related field fixed specifies related fields that restrict the records in
the related table. The related fixed field is normally an enum.• ForeignKey specifies a correspondence between a foreign key field
in the present table to the primary key field in another parent table. A
ForeignKey can be a PrimaryKey or a Single Field Altenate Key.
When it is a Primary Key, the relation is on the primary key field, for
example customer account. When it is a Single Field Alternate Key,
the relation is on the surrogate key, which is usually the RecId.

Best Regards,
Hossein Karimi