JDBC Execute Statement
JDBC Execute Statement is used to execute SQL Statement, The Execute
Statement accept SQL object as parameter and return you the result set
from a database. In this Tutorial, the code illustrates an example from
JDBC Execute Statement. The driver searches a table in the backend. Incase
the we try to create a new table on the name of existing table. The output of code show
you an Sql Exception, that table of this name already exist in the
database of your backend.
The code include a class JdbcExecuteStatement.The class include a main method. Inside
the main method, the list of steps to be carried out Loading a driver by calling a
class.forName( ) by passing driver class as argument. Once your driver is loaded, you
connect your front end application in java to the backend database.
DriverManager.getConnection
( ) : The Driver Manager Class call getConnection ( ),return you an
connection object This built a connection between the url and database.con.createStatement
( ) : This provides you an sql object. This is done when you built a connection
between Url and database, send sql object to execute the query in the
backend database.
st.execute ( ) : This method is used to execute the
sql query. This may return you a set of row into your table of database.
If
there exists an exception in try block, the catch block subsequently catch and
handle the exception. On execution of the code, the println in program
show you an exception indicates that created table already exist in database. JdbcExecuteStatement.java
import java.sql.*;
public class JdbcExecuteStatement {
public static void main(String args[]) {
~~`
Connection con = null;
Statement st = null;
String url = "jdbc:mysql://localhost:3306/";
String db = "komal";
String driver = "com.mysql.jdbc.Driver";
String user = "root";
String pass = "root";
try {
Class.forName(driver);
con = DriverManager.getConnection(url + db, user, pass);
st = con.createStatement();
String sql = "create table Abc(no integer,name varchar(10))";
st.execute(sql);
} catch (Exception e) {
System.out.println(e);
}
}
}
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Output
java.sql.SQLException: Table 'abc' already exists
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