JDBC Tutorials - Herong's Tutorial Examples - Version 3.03, by Dr. Herong Yang
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 "AdventureWorks2014" as the working database.
/* SelectDatabase.java
- Copyright (c) 2015, HerongYang.com, All Rights Reserved.
*/
import java.sql.*;
public class SelectDatabase {
public static void main(String [] args) {
Connection con = null;
try {
// Obtaining a connection to SQL Server
con = DriverManager.getConnection(
"jdbc:sqlserver://localhost\\SQLEXPRESS;"
+ "user=sa;password=HerongY@ng;"
+ "database=AdventureWorks2014");
// 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 (Exception e) {
e.printStackTrace();
}
}
}
The program output will confirm you that the database is selected correctly.
C:\herong>\Progra~1\java\jdk1.8.0_45\bin\java -cp .;\local\lib\sqljdbc42.jar SelectDatabase Connected to database: AdventureWorks2014
Last update: 2015.
Table of Contents
JDBC (Java Database Connectivity) Introduction
Installing and Running Java DB - Derby
Derby (Java DB) JDBC DataSource Objects
Java DB (Derby) - DML Statements
Java DB (Derby) - ResultSet Objects of Queries
Java DB (Derby) - PreparedStatement
MySQL JDBC Driver (MySQL Connector/J)
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 - Reference Implementation of JdbcRowSet
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 - sqljdbc42.jar
Installing Microsoft JDBC Driver for SQL Server
Loading Driver Class Automatically
Loading Driver Class with Class.forName()
DriverManager.getConnection() and Connection URL
Enabling TCP/IP with SQL Server Configuration Manager
Specifying Port Number in Connection URL
Instance Name Better than Port Number
Specifying Instance Name 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