Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;

public class Main {
    private static final String DRIVER = "com.mysql.jdbc.Driver";

    private static final String URL = "jdbc:mysql://localhost/testdb";

    private static final String USERNAME = "root";

    private static final String PASSWORD = "";

    public static void main(String[] args) throws Exception {
        Class.forName(DRIVER);
        Connection connection = DriverManager.getConnection(URL, USERNAME, PASSWORD);

        Statement statement = connection.createStatement();
        String query = "SELECT a.id, a.username, a.country_id, b.country_name " + "FROM users a "
                + "LEFT JOIN countries b ON a.country_id = b.id";
        ResultSet resultSet = statement.executeQuery(query);

        ResultSetMetaData metadata = resultSet.getMetaData();

        String tableName = metadata.getTableName(1);
        System.out.println("Table name of column 'id' = " + tableName);

        tableName = metadata.getTableName(4);
        System.out.println("Table name of column 'country name' = " + tableName);
    }
}