Which one is the best practice and Why?
The following are the main disadvantages of the natural key approach:
You might have an incorrect type name, or you may simply want to rename the type. To edit it, you would have to update all the tables that would be using it as a foreign key.
An index on an
int field will be much more compact than one on a
In some cases, it might be difficult to have a unique natural key, and this is necessary since it will be used as a primary key. This might not apply in your case.