JDBC Tutorials - Herong's Tutorial Notes

∟Microsoft JDBC Driver for SQL Server - sqljdbc.jar

∟Specifying Database Name in Connection URL

This section describes how to specify database name in connection URL.

When you create a connection object to a SQL Server without specifying any database name, the SQL Server will connect you to the default database that is linked to the login name. For example, "master" is the default database for login name "sa". If you create a connection with "sa" login name, the connection will be linked to "master" database.

If you want to work with a different database, you must specify the database name in the connection url in the following syntax:

jdbc:sqlserver://server_name:port;database=name;...

The tutorial program below shows you how to connect to the local SQL Server and select the sample database "AdventureWorksLT" as the working database.

/**
 * SelectDatabase.java
 * Copyright (c) 2007 by Dr. Herong Yang. All rights reserved.
 */
import java.sql.*;
public class SelectDatabase {
  public static void main(String [] args) {
    Connection con = null;
    try {

// Load Microsoft JDBC Driver 1.0
      Class.forName(
        "com.microsoft.sqlserver.jdbc.SQLServerDriver");

// Obtaining a connection to SQL Server
      con = DriverManager.getConnection(
          "jdbc:sqlserver://localhost:1269;"
        + "user=sa;password=HerongYang;"
        + "database=AdventureWorksLT");

// Checking the database name
      Statement sta = con.createStatement(); 
      ResultSet res = sta.executeQuery("SELECT DB_NAME()");
      res.next();
      String name = res.getString(1);
      System.out.println("Connected to database: "+name);

      con.close();        
    } catch (java.lang.ClassNotFoundException e) {
      System.err.println("ClassNotFoundException: "
        +e.getMessage());
    } catch (SQLException e) {
      System.err.println("SQLException: "
        +e.getMessage());
    }
  }
}

The program output will confirm you that the database is selected correctly.

C:\>\progra~1\java\jdk1.6.0_02\bin\java -cp .;\local\lib\sqljdbc.jar
   SelectDatabase

Connected to database: AdventureWorksLT

Table of Contents

 About This Book

 JDBC (Java Database Connectivity) Introduction

 Downloading and Installing JDK - Java SE

 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 2005 Express Edition

►Microsoft JDBC Driver for SQL Server - sqljdbc.jar

 Installing Microsoft JDBC Driver for SQL Server

 Loading Driver Class with Class.forName()

 DriverManager.getConnection() and Connection URL

 Specifying Port Number in Connection URL

 Closing the Database Connection - con.close()

►Specifying Database Name in Connection URL

 Incorrect Database Name in Connection URL

 Creating Connections with DataSource Class

 Microsoft JDBC Driver - Query Statements and Result Sets

 Microsoft JDBC Driver - DatabaseMetaData Object

 Microsoft JDBC Driver - DDL 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

 References

 PDF Printing Version