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# H2
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 2.5 MB jar file size
## Experimental Building & Testing with Maven
### Preparation
Use non-Maven build to create all necessary resources:
```Batchfile
./build.cmd compile
```
or
```sh
./build.sh compile
```
### Building
To build only the database jar use
```sh
mvn -Dmaven.test.skip=true package
```
If you don't have Maven installed use included [Maven Wrapper](https://github.com/takari/maven-wrapper) setup:
```sh
./mvnw -Dmaven.test.skip=true package
```
or
```Batchfile
./mvnw.cmd -Dmaven.test.skip=true package
```
Please note that jar generated with Maven is larger than official one and it does not include OSGi attributes.
Its configuration for native-image tool is also incomplete.
Use build script with `jar` target instead if you need a jar compatible with official builds.
### Testing
To run the tests use
```sh
mvn clean test
```
### Running
You can run the server like this
```sh
mvn exec:java -Dexec.mainClass=org.h2.tools.Server
```
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