Start the spring boot application and access the console in the browser with this URL : We can see the console like this. H2 databases are open-source compact relational databases written in Java language. Note that we can customize the URL of the H2 console, which, by default, is '/h2'. We must enable it to view and access it in the browser. Some of the main features of the H2 Database are: Very fast, open-source, JDBC API Embedded and server modes disk-based or in-memory databases Transaction support, multi-version concurrency Browser-based Console application Encrypted databases Fulltext search Pure Java with a small footprint. Enabling H2 Consoleīy default, the console view of the H2 database is disabled. ) INSERT INTO TBL_EMPLOYEES (first_name, last_name, email) VALUES It can be embedded in Java applications or run in client-server mode. data.sql – To insert default data rows. It is a relational database management system written in Java.
H2 DATABASE HOW TO
We may want to initialize the database with some fixed schema (DDL) and insert default data (DML) into tables before the application is ready for business usecases. See what companies are using H2 Database, its competitors and similar technologies, and how its market share breaks down by location, number of employees. Creating Schema and Inserting Data on Initialization To have a persistent data store capable of storing data between application start/stop, we should hold the data in files. In this case, data is written in temporary memory, and as soon as JVM is stopped, data is flushed. Persistent Database Configurationīy default, the in-memory databases are volatile, and all stored data will be lost when we restart the application. The H2 database query tool provided by RazorSQL includes visual tools for working with H2 databases, an H2 database browser, an SQL editor, H2 import and. If you wish to change the username and password, override them in the above properties options. Please note by default, spring boot configures the in-memory database connection with the username 'sa' and an empty password. Below are the configuration properties, we shall have in application.properties file for the most straightforward H2 configuration. Spring provides effortless configuration options to connect to any database using properties.
To use H2 in the Spring boot application, we need to add the H2 runtime jar into dependencies. An in-memory database instance can be created using the following URL structure: jdbc:h2:mem:
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