Chapter 4 Building Conceptual Data Models
When you delete an entity or entity attributes, data item options determine whether or not the corresponding data items are also deleted.
The following rules apply to deleted entity attributes:
| Data item options | Result of deleting an entity attribute |
|---|---|
| Unique Code
Allow Reuse |
Deletes entity attribute
Does not delete corresponding data item |
| Unique Code only | Deletes entity attribute
Does not delete corresponding data item |
| Allow Reuse only | Deletes entity attribute
Deletes corresponding data item if it is not used by another entity |
| None | Deletes entity attribute
Deletes corresponding data item |
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