Update data in a table using JDBC and MYSQL

The Java code for updating a record in a MYSQL table using JDBC is given below:

import java.sql.*;
public class UpdateData {
   static final String DB_URL = "jdbc:mysql://localhost/sampledb";
   static final String USER = "root";
   static final String PASS = "123456";
   static final String QUERY = "UPDATE students SET mobile=7788665544 where id=5";

   public static void main(String[] args) {
      // Open a connection
      try
	  {
		  Connection conn = DriverManager.getConnection(DB_URL, USER, PASS);
		  Statement stmt = conn.createStatement();
		  int rs = stmt.executeUpdate(QUERY);
		  System.out.println("No. of rows updated = " + rs);
      } 
	  catch (SQLException e) {
         e.printStackTrace();
      } 
   }
}

Output for the above program is given below:

No. of rows updated = 1

In the above program we are updating the mobile number of a student with id 5 to a new number.

Note: The above compiles successfully only when we add the JAR file to the CLASSPATH environment variable as shown below:

The data in the table after the above update is given below:

Suryateja Pericherla

Suryateja Pericherla, at present is a Research Scholar (full-time Ph.D.) in the Dept. of Computer Science & Systems Engineering at Andhra University, Visakhapatnam. Previously worked as an Associate Professor in the Dept. of CSE at Vishnu Institute of Technology, India.

He has 11+ years of teaching experience and is an individual researcher whose research interests are Cloud Computing, Internet of Things, Computer Security, Network Security and Blockchain.

He is a member of professional societies like IEEE, ACM, CSI and ISCA. He published several research papers which are indexed by SCIE, WoS, Scopus, Springer and others.