PreparedStatement with Parameters

This section describes how to create PreparedStatement objects with Parameters.

To make a PreparedStatement object more flexible, you add parameters to the embedded SQL statement with question marks (?). Real values should be added before executing the PreparedStatement object.

Adding values to PreparedStatement parameters should be done by calling setXXX() methods in this format:

ps.setXXX(1, value);
ps.setXXX(2, value);
ps.setXXX(n, value);
  // Sets value to the n-th parameter.

JDBC supports many setXXX() methods, one for each Java data type, so that you can set parameter values directly with the desired Java data types without any conversion. Here is a list of setXXX() methods:

Here is a sample program that created a PreparedStatement object with one parameter:

 * Copyright (c) All Rights Reserved.
import java.util.*;
import java.sql.*;
import javax.sql.*;
import javax.naming.*;
public class DerbyPreparedStatementParameter {
  public static void main(String [] args) {
    Connection con = null;
    try {
      Hashtable env = new Hashtable();
      env.put(Context.PROVIDER_URL, "file:/local/fscontext");
      Context ctx = new InitialContext(env);
      DataSource ds = (DataSource) ctx.lookup("DerbyTestDB");
      con = ds.getConnection();

// PreparedStatement for SELECT statement with one parameter
      PreparedStatement sta = con.prepareStatement(
  "SELECT * FROM Profile WHERE ID = ?");

// Provide a value to the parameter
      int id = 9;

// Execute the PreparedStatement as a query
      ResultSet res = sta.executeQuery();

// Get values out of the ResultSet;
      String firstName = res.getString("FirstName");
      String lastName = res.getString("LastName");
      System.out.println("User ID "+id+": "+firstName+' '+lastName);

// Close ResultSet and PreparedStatement

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

Here is the output:

User ID 9: Johnny Caprio

Table of Contents

 About This Book

 JDBC (Java Database Connectivity) Introduction

 JDK (Java SE) Installation

 Installing and Running Derby (Java DB)

 Derby (Java DB) JDBC Driver

 Derby (Java DB) JDBC DataSource Objects

 Derby (Java DB) - DML Statements

 Derby (Java DB) - ResultSet Objects of Queries

Derby (Java DB) - PreparedStatement

 PreparedStatement Overview

PreparedStatement with Parameters

 PreparedStatement in Batch Mode

 Performance of Inserting Rows with a PreparedStatement

 Performance of Inserting Rows with a Regular Statement

 Performance of Inserting Rows with a ResultSet

 Summary of JDBC Drivers and Database Servers

 Using Connection Pool with JDBC

 Archived Tutorials


 Full Version in PDF/EPUB