eva/3 Application Builder • Developing eva/3 Applications • Working with Databases 

Referential Integrity

eva/3 allows tables to have referential integrity. This maintains consistency between the tuples of associated relations and thus ensures the correctness of the association between the relations.

For each foreign key there exists a primary key in the referenced relation and that for every many to one relationship (1:0..1, 1:1, 1:1..*, 1:* in UML-Notation) specified in the schema the multiplicity of the relationship is adhered to.

Working with Databases Working with Databases
Creating Areas Creating Areas
Creating Referential Integrity Creating Referential Integrity
Defining Entities Defining Entities
Defining Relationships Defining Relationships
Inserting a Table Inserting a Table