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H2 Database Engine
Welcome to H2, the Java SQL database. The main features of H2 are:
 
Very fast, open source, JDBC API
Embedded and server modes; in-memory databases
Browser based Console application
Small footprint: around 2 MB jar file size
 
    |  |  |  |  | Features
        |  | H2 | Derby | HSQLDB | MySQL | PostgreSQL |  
        | Pure Java | Yes | Yes | Yes | No | No |  
        | Memory Mode | Yes | Yes | Yes | No | No |  
        | Encrypted Database | Yes | Yes | Yes | No | No |  
        | ODBC Driver | Yes | No | No | Yes | Yes |  
        | Fulltext Search | Yes | No | No | Yes | Yes |  
        | Multi Version Concurrency | Yes | No | Yes | Yes | Yes |  
        | Footprint (embedded) | ~2 MB | ~3 MB | ~1.5 MB | — | — |  
        | Footprint (client) | ~500 KB | ~600 KB | ~1.5 MB | ~1 MB | ~700 KB | 
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        | Contribute
            You can contribute to the development of H2 by sending feedback and bug
            reports, or translate the H2 Console application (for details, start the H2 Console
            and select Options / Translate).
            To donate money, click on the PayPal button below. You will be listed as a supporter:
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