JDBC - Create Tables Example



This section gives a model on the most proficient method to make a table utilizing JDBC application. Prior to executing the accompanying model, ensure you have the accompanying set up −

  • To execute the accompanying precedent you can supplant the username and password with your real client name and password.

  • Your MySQL or whatever database you are utilizing is up and running.

Required Steps

The following advances are required to make another Database utilizing JDBC application −

  • Import the packages: Requires that you incorporate the bundles containing the JDBC classes required for database programming. Regularly, utilizing import java.sql.* will suffice.

  • Register the JDBC driver: Requires that you instate a driver so you can open an interchanges channel with the database.

  • Open a connection: Requires utilizing the DriverManager.getConnection() strategy to make a Connection object, which speaks to a physical association with a database server.

  • Execute a query: Requires utilizing an object of sort Statement for building and presenting a SQL proclamation to make a table in a seleted database.

  • Clean up the environment: Requires expressly shutting all database assets as opposed to depending on the JVM's rubbish collection.

Sample Code

Copy and glue the accompanying precedent in JDBCExample.java, accumulate and keep running as pursues −

//STEP 1. Import required packages 

import java.sql.*; 

public class JDBCExample { 

//JDBC driver name and database URL 

static final String JDBC_DRIVER = "com.mysql.jdbc.Driver"; 

static final String DB_URL = "jdbc:mysql://localhost/STUDENTS";

//Database credentials 

static final String USER = "username"; 

static final String PASS = "password"; 

public static void main(String[] args) { 

Connection conn = null; 

Statement stmt = null; 

try{ 

//STEP 2: Register JDBC driver 

Class.forName("com.mysql.jdbc.Driver"); 

//STEP 3: Open a connection 

System.out.println("Connecting to a chose database..."); 

conn = DriverManager.getConnection(DB_URL, USER, PASS); 

System.out.println("Connected database successfully..."); 

//STEP 4: Execute a query 

System.out.println("Creating table in given database..."); 

stmt = conn.createStatement(); 

String sql = "CREATE TABLE REGISTRATION " +

"(id INTEGER not NULL, " + 

" first VARCHAR(255), " + 

" last VARCHAR(255), " + 

" age INTEGER, " + 

" PRIMARY KEY ( id ))"; 

stmt.executeUpdate(sql); 

System.out.println("Created table in given database..."); 

}catch(SQLException se){ 

//Handle blunders for JDBC 

se.printStackTrace(); 

}catch(Exception e){ 

//Handle blunders for Class.forName 

e.printStackTrace(); 

}finally{ 

//at last square used to close resources 

try{ 

if(stmt!=null) 

conn.close(); 

}catch(SQLException se){ 

}//do nothing 

try{ 

if(conn!=null) 

conn.close(); 

}catch(SQLException se){ 

se.printStackTrace();
}//end at long last try 

}//end try 

System.out.println("Goodbye!"); 

}//end main 

}//end JDBCExample

Now, let us assemble the above precedent as pursues −

C:\>javac JDBCExample.java 

C:\>

When you run JDBCExample, it delivers the accompanying outcome −

C:\>java JDBCExample 

Connecting to a chose database... 

Connected database successfully... 

Creating table in given database... 

Created table in given database... 

Goodbye! 

C:\>






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