CREATE TRIGGER AU_TRIGGER
AFTER UPDATE ON TABLE_A FOR EACH ROW
CALL "com.trigger.MyTrigger";

LOAD DATA LOW_PRIORITY INFILE 'C:/Users/mytextfile.delim'
REPLACE INTO TABLE TABLE_B
FIELDS TERMINATED BY '|'
IGNORE 1 LINES
(name, age, etc);

This is my application.yml spring.datasource.url
=jdbc:h2:mem:mydb;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE;MODE=MYSQL
spring.datasource.username: myusername
spring.datasource.password: mypassword
driver-class-name: org.h2.Driver

@Bean
public DataSource dataSource() throws SQLException {
    EmbeddedDatabaseBuilder builder = new EmbeddedDatabaseBuilder();
    EmbeddedDatabase db = builder
            .setType(EmbeddedDatabaseType.H2)
            .setName("mydb;MODE=MYSQL")
            .addScript("mariadb.sql") //it has to be different than data.sql otherwise Springboot will pick data.sql automatically and this will also run.
            .build();
    return db;
}

@Bean
@DependsOn("dataSource")
public Void string(DataSource db) throws SQLException {
    //read file using whatever means. I used Scanner and delimeted it myself.
    List<List<String>> list = readFile();
    final Connection connection = db.getConnection();
    //here use the prepratedStatements
    PreparedStatement stmt = connection.prepareStatement(Insert xyz);//lookup how to use PreparedStatement.
    }