![}
public static void main(String args[]) throws SQLException
,ClassNotFoundException
{
DBTwoTables d1=new DBTwoTables();
}
}
2. package Examples;
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/**
*
* @author Bk
*/
/*import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
import java.sql.SQLException;
import java.sql.ResultSet;
*/
import java.sql.*;
public class Db1 {
public static void main(String args[]) throws
SQLException,ClassNotFoundException {
// Load the JDBC driver
Class.forName("com.mysql.jdbc.Driver");
System.out.println("Driver loaded");
// Establish a connection
Connection connection = DriverManager.getConnection
("jdbc:mysql://localhost/dbsample", "root", "root");
System.out.println("Database connected");](https://image.slidesharecdn.com/db-examples-160201065236/85/Db-examples-2-320.jpg)
![{
System.out.println(resultSet.getString(1)+ "t" +
resultSet.getString(2)+ "t" + resultSet.getString(3));
}
*/
// Close the connection
connection.close();
}
catch (ClassNotFoundException ex )
{
System.out.println(ex.getMessage());
}
catch (SQLException ex )
{
System.out.println(ex.getMessage());
//ex.printStackTrace();
}
}
public static void main(String args[]) throws SQLException
,ClassNotFoundException
{
DBUpdate d1=new DBUpdate();
}
}
4.package Examples;
import java.sql.*;
public class DBDelete {
public DBDelete()
{
// Load the JDBC driver
try{
Class.forName("com.mysql.jdbc.Driver");
System.out.println("Driver loaded");](https://image.slidesharecdn.com/db-examples-160201065236/85/Db-examples-4-320.jpg)
![// Establish a connection
Connection connection = DriverManager.getConnection
("jdbc:mysql://localhost/test", "root", "root");
System.out.println("Database connected");
// Create a statement
Statement statement = connection.createStatement();
// Execute a statement
statement.executeUpdate("delete from tblEmployee where empName='dady'
");
System.out.println("the update is successful");
// Iterate through the result and print the student names
/*while(resultSet.next() )
{
System.out.println(resultSet.getString(1)+ "t" +
resultSet.getString(2)+ "t" + resultSet.getString(3));
}
*/
// Close the connection
connection.close();
}
catch (ClassNotFoundException ex )
{
System.out.println(ex.getMessage());
}
catch (SQLException ex )
{
System.out.println(ex.getMessage());
//ex.printStackTrace();
}
}
public static void main(String args[]) throws SQLException
,ClassNotFoundException
{
DBDelete d1=new DBDelete();
}
}](https://image.slidesharecdn.com/db-examples-160201065236/85/Db-examples-5-320.jpg)
Db examples
- 1. 1. package Examples; import java.sql.*; public class DBTwoTables { public DBTwoTables() { // Load the JDBC driver try{ Class.forName("com.mysql.jdbc.Driver"); System.out.println("Driver loaded"); // Establish a connection Connection connection = DriverManager.getConnection ("jdbc:mysql://localhost/test", "root", "root"); System.out.println("Database connected"); // Create a statement Statement statement = connection.createStatement(); // Execute a statement ResultSet resultSet = statement.executeQuery("select e.empId,e.empName,c.comBranch from tblCompany1 c,tblEmployee e where c.comNo=e.comNo and c.comNo='com1' "); // Iterate through the result and print the student names while(resultSet.next() ) { System.out.println(resultSet.getString(1)+ "t" + resultSet.getString(2)+ "t" + resultSet.getString(3)); } // Close the connection connection.close(); } catch (ClassNotFoundException ex ) { System.out.println(ex.getMessage()); } catch (SQLException ex ) { System.out.println(ex.getMessage()); //ex.printStackTrace(); }
- 2. } public static void main(String args[]) throws SQLException ,ClassNotFoundException { DBTwoTables d1=new DBTwoTables(); } } 2. package Examples; /* * To change this template, choose Tools | Templates * and open the template in the editor. */ /** * * @author Bk */ /*import java.sql.Connection; import java.sql.DriverManager; import java.sql.Statement; import java.sql.SQLException; import java.sql.ResultSet; */ import java.sql.*; public class Db1 { public static void main(String args[]) throws SQLException,ClassNotFoundException { // Load the JDBC driver Class.forName("com.mysql.jdbc.Driver"); System.out.println("Driver loaded"); // Establish a connection Connection connection = DriverManager.getConnection ("jdbc:mysql://localhost/dbsample", "root", "root"); System.out.println("Database connected");
- 3. // Create a statement Statement statement = connection.createStatement(); // Execute a statement ResultSet resultSet = statement.executeQuery("select * from tblemployee"); // Iterate through the result and print the student names while(resultSet.next() ){ System.out.println(resultSet.getString(1)+ "t" + resultSet.getString(2)+ "t" + resultSet.getString(3)); } // Close the connection connection.close(); } } 3. package Examples; import java.sql.*; public class DBUpdate { public DBUpdate() { // Load the JDBC driver try{ Class.forName("com.mysql.jdbc.Driver"); System.out.println("Driver loaded"); // Establish a connection Connection connection = DriverManager.getConnection ("jdbc:mysql://localhost/test", "root", "root"); System.out.println("Database connected"); // Create a statement Statement statement = connection.createStatement(); // Execute a statement statement.executeUpdate("update tblCompany1 set comBranch='Bole' where comBranch like'S%' "); System.out.println("the update is successful"); // Iterate through the result and print the student names /*while(resultSet.next() )
- 4. { System.out.println(resultSet.getString(1)+ "t" + resultSet.getString(2)+ "t" + resultSet.getString(3)); } */ // Close the connection connection.close(); } catch (ClassNotFoundException ex ) { System.out.println(ex.getMessage()); } catch (SQLException ex ) { System.out.println(ex.getMessage()); //ex.printStackTrace(); } } public static void main(String args[]) throws SQLException ,ClassNotFoundException { DBUpdate d1=new DBUpdate(); } } 4.package Examples; import java.sql.*; public class DBDelete { public DBDelete() { // Load the JDBC driver try{ Class.forName("com.mysql.jdbc.Driver"); System.out.println("Driver loaded");
- 5. // Establish a connection Connection connection = DriverManager.getConnection ("jdbc:mysql://localhost/test", "root", "root"); System.out.println("Database connected"); // Create a statement Statement statement = connection.createStatement(); // Execute a statement statement.executeUpdate("delete from tblEmployee where empName='dady' "); System.out.println("the update is successful"); // Iterate through the result and print the student names /*while(resultSet.next() ) { System.out.println(resultSet.getString(1)+ "t" + resultSet.getString(2)+ "t" + resultSet.getString(3)); } */ // Close the connection connection.close(); } catch (ClassNotFoundException ex ) { System.out.println(ex.getMessage()); } catch (SQLException ex ) { System.out.println(ex.getMessage()); //ex.printStackTrace(); } } public static void main(String args[]) throws SQLException ,ClassNotFoundException { DBDelete d1=new DBDelete(); } }