Change the Null Option for a Non-Identifying Relationship
If you have set a global default null option for all non-identifying relationships, and you need to change the setting for a specific relationship, you can do so using the Relationships editor.
To change the null option for a non-identifying relationship
- Right-click the non-identifying relationship for which you want to change the null option, then click Relationship Properties.
The Relationships editor opens.
- Click the General tab.
The General tab opens.
- Select one of the following null options that you want to assign to the non-identifying relationship, then click OK.
- Nulls Allowed
Specifies that the child entity can exist without the existence of the parent and the relationship is optional (non-mandatory). There is a diamond displayed on the parent end within the diagram.
- No Nulls
Specifies that the child entity is dependent upon the parent entity for its existence and the relationship is mandatory. There is no diamond displayed on the parent end within the diagram.
The null option is changed for the non-identifying relationship and the Relationships editor closes.
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