jdbc-130913021409-phpapp01000988www.pptx

Discussions
⦿What is JDBC?
⦿What is ODBC?
⦿JDBC vs ODBC?
⦿ Architecture of JDBC.
⦿ Types of JDBC driver available.
⦿ Steps to connect to DB.
⦿ Types of Statement.

What is JDBC ?
⦿ JDBC acronym of Java Database
connectivity; though Sun Microsystems
⦿JDBC is a standard java API for
independent database connection
between a java program and wide range
of relational database.
⦿It is present in the “java.sql” package

 JDBC is an interface between Java and Database
 JDBC receives queries from Java Application program and
communicate with Database
 All the communications are in the form of SQL commands
 JDBC is reponsible for
 Open a Connection
 Communicate with database
 Execute SQL statements
 Retrive query results
What is JDBC ?

Open DataBase Connectivity (ODBC)
 Standard designed by Microsoft to interact with
databases
 ODBC is packed with many features and extending
support for all type of databases
 ODBC provides multiple mechanism for performing
single task and number of data handling capabilities

JDBC vs ODBC
 JDBC and ODBC are X/OPEN call level interface
for SQL
 JDBC is not a derivative of ODBC
 JDBC is compact and simple
 JDBC is meant for simple access to the database and
difficult task at least make possible

JDBC Drivers
 JDBC driver is responsible for making connection with different
databases
 It is also translating the queries received from Application and
submit into database
 A reverse translation is also required to perform by the Driver
 JDBC Driver speaks JAVA to Application and native language
to database
 JDBC Drivers are exists for almost all databases
 Appropriate driver will load for requied database

Types of JDBC driver
⦿Type 1; jdbc-odbc bridge driver
⦿Type 2; native API partly java driver.
⦿Type 3; net protocols all java driver.
⦿ Type 4; native protocols all java driver.

JDBC – ODBC Bridge
 It is a JDBC driver designed to let Java application
communicate with database via an underlying ODBC driver
 It is called Type I JDBC connector
 It can be used with multiple databases and is vendor
independent
 This type JDBC driver speaks only to ODBC driver, hence
works for Databases supported by ODBC
 One more added layer is used and hence more complex and
slower than JDBC drivers

Native-API-Partly-Java Driver
 It make use of local native libraries to communicate
with database
 Vendor specific Call Level Interface(CLI) installed
locally are used by this type driver
 CLI libraries are actually communicate with
database
 Application level requests are translated into
equallent native method call of CLI
 Faster than Type I driver

JDBC-Net-All-Java Driver
 Type III Driver, uses the CLI libraries locates in a remote server
 Type III driver has two major components
 An All-Java portion that can download to the client
 Server portion containing both Java and Native methods
 All communication between Application and Database is 100%
Java to Java
 This type of driver is also depending on CLI calls, which is
installed on Server
 Type III can be used in Internet, since no direct access to CLI
libraries
 Type III Network protocol is not standardized

Native-Protocol-All-Java Driver
 100% java specific drivers
 No intermediate translation is required
 But all vendor specific driver cannot released by
Java
 Java Applets are now free from Acces restrictions

Steps to connect?
⦿Define the connection URL.
⦿Established the connection.
⦿ Create the Statement object.
⦿Execute a query.
⦿Process the results.
⦿Close the connection.

Steps to connect?
⦿Define the connection url :
Class.forName();
⦿ For jdbc-odbc bridge driver:-
Class.forName(“sun.jdbc.odbc.JdbcOdbcDriver”);
⦿ For oracle driver:-
Class.forName(“oracle.jdbc.driver.OracleDriver”);
⦿ For My sql driver:-
Class.forName(“com.mysql.jdbc.Driver”);

Steps to connect?
⦿ Established the connection:
Connection con
=DriverManager.getConnection(“url”,”user_name”,”pass”);

Steps to connect?
⦿ Create the Statement object:
Statement stmt=con.createStatement();

Steps to connect?
⦿Execute the query:
 For the SELECT query:-
 String sql=“SELECT * FROM EMP”;
 stmt.executeQuery(sql);
 For the INSERT/UPDATE query:-
 String sql=“INSERT INTO EMP VALUES(47,’TEDDY’)”;
 stmt.executeUpdate(sql);

Steps to connect?
⦿Process the result:-
ResultSet rs=stmt.execute Query(sql);
while(rs.next()){
System.out.println(rs.getInt(id));
System.out.print(rs.getString(name));
}

Steps to connect?
⦿Close the connection
release all the resources that the connection
is holding.
stmt.close();
con.close();

Steps to connect?
⦿ Summarizing the steps for connecting java DB and inserting values in
DB
Class.forName("org.apache.derby.jdbc.ClientDriver");
Connection
con=DriverManager.getConnection("jdbc:derby://localhost:1527/orbac
us","teddy","teddy");
Statement
stmt=con.createStatement();
String sql=“INSERT INTO
TEDDY(47,’jani’)”;
stmt.executeUpdate(sql);
stmt.close();
con.close();

Types of Statement available
⦿There are three types of Statement
available in Statement class:-
 Statement
 PreparedStatement
 CallableStatement

⦿Statement
This represent a simple sql/mysql
statement.
Statement stmt=con.createStatement();

⦿PreparedStatement
this represent precompiled sql/my sql
statement which allows improved
performance. It allows to execute the query
multiple times and we can set the values
according to our need.
PreparedStatement psmt=con.prepareStatement();

⦿CallableStatement
This allows the access of stored
procedures; that are stored on the database.
CallableStatement csmt=con.prepareCall();

jdbc-130913021409-phpapp01000988www.pptx

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