### Berkeley DB Reference Guide: Java API Tutorial - Index |

### Index - Indices and foreign keys

In the Basic example, each store has a single primary key. The Index example extends the Basic example to add the use of secondary keys and foreign keys. The example program illustrates:

- Opening secondary key indices
- Opening foreign key indices
- Creating indexed collections
- Retrieving items by index key

The complete source of the final version of the example program is included in the Berkeley DB distribution.

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