- JDBC Tutorial
- JDBC - Home
- JDBC - Introduction
- JDBC - SQL Syntax
- JDBC - Environment
- JDBC - Sample Code
- JDBC - Driver Types
- JDBC - Connections
- JDBC - Statements
- JDBC - Result Sets
- JDBC - Data Types
- JDBC - Transactions
- JDBC - Exceptions
- JDBC - Batch Processing
- JDBC - Stored Procedure
- JDBC - Streaming Data
- JDBC Examples
- JDBC - Create Database
- JDBC - Select Database
- JDBC - Drop Database
- JDBC - Create Tables
- JDBC - Drop Tables
- JDBC - Insert Records
- JDBC - Select Records
- JDBC - Update Records
- JDBC - Delete Records
- JDBC - WHERE Clause
- JDBC - Like Clause
- JDBC - Sorting Data
- JDBC Useful Resources
- JDBC - Questions and Answers
- JDBC - Quick Guide
- JDBC - Useful Resources
- JDBC - Discussion
- Useful - Java Tutorials
JDBC - Statement Object Example
Following is the example, which makes use of the PreparedStatement along with opening and closing statements −
This sample code has been written based on the environment and database setup done in the previous chapters.
Copy and paste the following example in JDBCExample.java, compile and run as follows −
import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; public class JDBCExample { static final String DB_URL = "jdbc:mysql://localhost/TUTORIALSPOINT"; static final String USER = "guest"; static final String PASS = "guest123"; static final String QUERY = "SELECT id, first, last, age FROM Employees"; static final String UPDATE_QUERY = "UPDATE Employees set age=? WHERE id=?"; public static void main(String[] args) { // Open a connection try(Connection conn = DriverManager.getConnection(DB_URL, USER, PASS); PreparedStatement stmt = conn.prepareStatement(UPDATE_QUERY); ) { // Bind values into the parameters. stmt.setInt(1, 35); // This would set age stmt.setInt(2, 102); // This would set ID // Let us update age of the record with ID = 102; int rows = stmt.executeUpdate(); System.out.println("Rows impacted : " + rows ); // Let us select all the records and display them. ResultSet rs = stmt.executeQuery(QUERY); // Extract data from result set while (rs.next()) { // Retrieve by column name System.out.print("ID: " + rs.getInt("id")); System.out.print(", Age: " + rs.getInt("age")); System.out.print(", First: " + rs.getString("first")); System.out.println(", Last: " + rs.getString("last")); } rs.close(); } catch (SQLException e) { e.printStackTrace(); } } }
Now let us compile the above example as follows −
C:\>javac JDBCExample.java C:\>
When you run JDBCExample, it produces the following result −
C:\>java JDBCExample Return value is : false Rows impacted : 1 ID: 100, Age: 18, First: Zara, Last: Ali ID: 101, Age: 25, First: Mehnaz, Last: Fatma ID: 102, Age: 35, First: Zaid, Last: Khan ID: 103, Age: 30, First: Sumit, Last: Mittal C:\>
Advertisements