The JDBC PreparedStatement is used to execute parameterized queries against the database. Let us study JDBC PreparedStatement by deletes a record example.
Example:
JDBCTest.java
import java.sql.Connection; import java.sql.PreparedStatement; import com.w3schools.util.JDBCUtil; /** * This class is used to delete a record from DB table * using PreparedStatement. * @author w3schools */ public class JDBCTest { public static void main(String args[]){ Connection conn = null; PreparedStatement preparedStatement = null; String query = "delete EMPLOYEE " + "where EMPLOYEE_ID = 1 "; try{ //get connection conn = JDBCUtil.getConnection(); //create preparedStatement preparedStatement = conn.prepareStatement(query); //execute query preparedStatement.executeUpdate(); //close connection preparedStatement.close(); conn.close(); System.out.println("Record deleted successfully."); }catch(Exception e){ e.printStackTrace(); } } } |
JDBCUtil.java
import java.sql.Connection; import java.sql.DriverManager; /** * This is a utility class for JDBC connection. * @author w3schools */ public class JDBCUtil { //JDBC and database properties. private static final String DB_DRIVER = "oracle.jdbc.driver.OracleDriver"; private static final String DB_URL = "jdbc:oracle:thin:@localhost:1521:XE"; private static final String DB_USERNAME = "system"; private static final String DB_PASSWORD = "oracle"; public static Connection getConnection(){ Connection conn = null; try{ //Register the JDBC driver Class.forName(DB_DRIVER); //Open the connection conn = DriverManager. getConnection(DB_URL, DB_USERNAME, DB_PASSWORD); if(conn != null){ System.out.println("Successfully connected."); }else{ System.out.println("Failed to connect."); } }catch(Exception e){ e.printStackTrace(); } return conn; } } |
Output:
Successfully connected.
Record deleted successfully. |
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