Derby (Java DB) - Running SELECT Queries

JDBC Tutorials - Herong's Tutorial Examples

∟Derby (Java DB) - Running SELECT Queries

This section describes how to run SELECT queries through the JDBC driver.

After inserting data into my Access database, I want to get it back with a SELECT query. Here is my sample program to get all rows back from the table HY_Address:

/* DerbyQuery.java
 * Copyright (c) HerongYang.com. All Rights Reserved.
 */
import java.sql.*;
public class DerbyQuery {
  public static void main(String [] args) {
    Connection con = null;
    try {
      con = DriverManager.getConnection("jdbc:derby://localhost/TestDB");
      Statement sta = con.createStatement();

// getting the data back
      ResultSet res = sta.executeQuery(
        "SELECT * FROM HY_Address");
      System.out.println("List of Addresses: ");
      while (res.next()) {
         System.out.println(
           "  "+res.getInt("ID")
           + ", "+res.getString("StreetName")
           + ", "+res.getString("City"));
      }
      res.close();

      sta.close();
      con.close();
    } catch (Exception e) {
      System.err.println("Exception: "+e.getMessage());
    }
  }
}

The output looked correct to me:

herong> java -cp %DERBY_HOME%\lib\derbyclient.jar DerbyQuery.java
herong> java -cp $DERBY_HOME/lib/derbyclient.jar DerbyQuery.java

List of Addresses:
  1, 5 Baker Road, Bellevue
  2, 25 Bay St., Hull
  3, 251 Main St., W. York