Executing "Update" Statements - executeUpdate()

This section describes how to execute 'update' SQL statements like DDL statements, or DML statements.

JDBC supports two basic types of statement executions:

Note executing update statements requires higher security permissions. I am assuming that your login has been granted enough permissions to follow my tutorials.

DDL (Data Definition Language) statements are used to create, alter or drop database objects like tables, views, indexes, or stored procedures. Here is a sample Java program that uses an executeUpdate() method to create a simple table in the current database:

/* ExecuteUpdate.java
 * Copyright (c) HerongYang.com. All Rights Reserved.
 */
import java.sql.*;
public class ExecuteUpdate {
  public static void main(String [] args) {
    Connection con = null;
    try {

      con = DriverManager.getConnection(
          "jdbc:sqlserver://localhost\\SQLEXPRESS;"
        + "user=sa;password=HerongY@ng;"
        + "database=AdventureWorks2014");

// Executing update statements
      Statement sta = con.createStatement();
      int count = sta.executeUpdate(
        "CREATE TABLE HerongTest (Name VARCHAR(20), Age INT)");
      System.out.println("Return value from executeUpdate(): "+count);
      System.out.println("Table created.");
      sta.close();

      con.close();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

If you run this program, a new table will be created in the current database on the SQL Server, and you will get a output message like this:

herong> java -cp .:mssql-jdbc-7.4.1.jre12.jar ExecuteUpdate.java

Return value from executeUpdate(): 0
Table created.

But if you run it again, you will get a SQLException because the same table can not be created twice:

com.microsoft.sqlserver.jdbc.SQLServerException:
There is already an object named 'HerongTest' in the database.

Table of Contents

 About This Book

 JDBC (Java Database Connectivity) Introduction

 JDK (Java SE) Installation

 Installing and Running Java DB - Derby

 Derby (Java DB) JDBC Driver

 Derby (Java DB) JDBC DataSource Objects

 Java DB (Derby) - DML Statements

 Java DB (Derby) - ResultSet Objects of Queries

 Java DB (Derby) - PreparedStatement

 MySQL Installation on Windows

 MySQL JDBC Driver (MySQL Connector/J)

 MySQL - PreparedStatement

 MySQL - Reference Implementation of JdbcRowSet

 MySQL - JBDC CallableStatement

 MySQL CLOB (Character Large Object) - TEXT

 MySQL BLOB (Binary Large Object) - BLOB

 Oracle Express Edition Installation on Windows

 Oracle JDBC Drivers

 Oracle - Reference Implementation of JdbcRowSet

 Oracle - PreparedStatement

 Oracle - JBDC CallableStatement

 Oracle CLOB (Character Large Object) - TEXT

 Oracle BLOB (Binary Large Object) - BLOB

 Microsoft SQL Server Express Edition

 Microsoft JDBC Driver for SQL Server

 Microsoft JDBC Driver - Query Statements and Result Sets

 Microsoft JDBC Driver - DatabaseMetaData Object

Microsoft JDBC Driver - DDL Statements

Executing "Update" Statements - executeUpdate()

 "CREATE SCHEMA" Statements

 "CREATE TABLE" Statements

 "ALTER TABLE" Statements

 "DROP TABLE" Statements

 Microsoft JDBC Driver - DML Statements

 SQL Server - PreparedStatement

 SQL Server CLOB (Character Large Object) - TEXT

 SQL Server BLOB (Binary Large Object) - BLOB

 JDBC-ODBC Bridge Driver - sun.jdbc.odbc.JdbcOdbcDriver

 JDBC-ODBC Bridge Driver - Flat Text Files

 JDBC-ODBC Bridge Driver - MS Access

 JDBC-ODBC Bridge Driver - MS SQL Server

 Summary of JDBC Drivers and Database Servers

 Additional Tutorial Notes to Be Added

 Outdated Tutorials

 References

 Full Version in PDF/EPUB