Multiple-client features available in Derby

Derby contains some features that are useful for developing multi-user applications.

• Row-level locking
  To support multi-user access, Derby uses row-level locking.
• Multiple concurrency levels
  Derby supports the SERIALIZABLE (RR), REPEATABLE (RS), READ COMMITTED (CS), and READ UNCOMMITTED (UR) isolation levels.
• Multi-connection and multi-threading
  Derby allows multiple simultaneous connections to a database, even in embedded mode.
• Administrative tools
  Derby provides some tools and features to assist database administrators, including the following.