What criteria should I consider when creating a table?
First and foremost, the table should represent an entity in your logical data model. The columns of that table represent the attributes of that entity. Somewhere in that logical data model, the relationships between the entities are also defined. The logical model should also identify any constraints imposed on the data in the table.
Once the logical model of the table has been determined, it is time to start thinking about the physical implementation. Most tables are simply heap structures, but the Oracle DBA does have to place the table in a tablespace. The Oracle DBA also needs to determine if the table should use a non-traditional storage mechanism, such as an Indexed Organized Table. The DBA also needs to determine which indexes would be required. The physical implementation must match the logical data model.
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