H2

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

SpringBoot

pom.xml

   1 <dependency>
   2     <groupId>com.h2database</groupId>
   3     <artifactId>h2</artifactId>
   4     <version>2.3.232</version>
   5 </dependency>

application.yaml

   1 spring:
   2   datasource:
   3     url: jdbc:h2:file:./mydb
   4     username: xx
   5     password: xx
   6   jpa:
   7     hibernate:
   8       ddl-auto: update
   9     show-sql: false

Use H2 database

   1 java -cp h2-2.3.232.jar org.h2.tools.Shell -url "jdbc:h2:file:./chucknorrisdb" -user "xx" -password "xx"
   2 show tables;
   3 select * from tablex;
   4 exit