This is a quick cheat sheet for application.properties entries for various databases like MySQL, SQLServer, MariaDB, PostgreSQL Spring boot: 2.1.6.RELEASE Add the below entry to your spring boot /src/main/resources/application.properties. You could choose the DB profile you want and comment the others. #Choose one and comment others spring.profiles.active=mysql #spring.profiles.active=sqlserver #spring.profiles.active=maria #spring.profiles.active=postgres