Get Generated Keys From Preparedstatement

1. Get Generated Keys From Preparedstatement Windows 10
2. Get Generated Keys From Preparedstatement 2017
3. Get Generated Keys From Preparedstatement Iphone
4. Get Generated Keys From Preparedstatement Paper

The PreparedStatement interface is a subinterface of Statement. It is used to execute parameterized query.

Now, to insert records into this table using PreparedStatement object and, to retrieve the auto-incremented values generated by it − Register the Driver class of the desired database using the registerDriver method of the DriverManager class or, the forName method of the class named Class.

Let's see the example of parameterized query:

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Get Generated Keys From Preparedstatement Windows 10

String sql='insert into emp values(?,?,?)';

As you can see, we are passing parameter (?) for the values. Its value will be set by calling the setter methods of PreparedStatement.

Why use PreparedStatement?

Pc cleaner pro license key generator. Improves performance: The performance of the application will be faster if you use PreparedStatement interface because query is compiled only once.

How to get the instance of PreparedStatement?

The prepareStatement() method of Connection interface is used to return the object of PreparedStatement. Syntax:

public PreparedStatement prepareStatement(String query)throws SQLException{}

Methods of PreparedStatement interface

The important methods of PreparedStatement interface are given below:

Method	Description
public void setInt(int paramIndex, int value)	sets the integer value to the given parameter index.
public void setString(int paramIndex, String value)	sets the String value to the given parameter index.
public void setFloat(int paramIndex, float value)	sets the float value to the given parameter index.
public void setDouble(int paramIndex, double value)	sets the double value to the given parameter index.
public int executeUpdate()	executes the query. It is used for create, drop, insert, update, delete etc.
public ResultSet executeQuery()	executes the select query. It returns an instance of ResultSet.

Example of PreparedStatement interface that inserts the record

Download microsoft office plus 2010 64 bit. First of all create table as given below:

create table emp(id number(10),name varchar2(50));

Now insert records in this table by the code given below:

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import java.sql.*;class InsertPrepared{public static void main(String args[]){try{Class.forName('oracle.jdbc.driver.OracleDriver');Connection con=DriverManager.getConnection('jdbc:oracle:thin:@localhost:1521:xe','system','oracle');PreparedStatement stmt=con.prepareStatement('insert into Emp values(?,?)');stmt.setInt(1,101);//1 specifies the first parameter in the querystmt.setString(2,'Ratan');int i=stmt.executeUpdate();System.out.println(i+' records inserted');con.close();}catch(Exception e){ System.out.println(e);}}}

Example of PreparedStatement interface that updates the record

PreparedStatement stmt=con.prepareStatement('update emp set name=? where id=?');stmt.setString(1,'Sonoo');//1 specifies the first parameter in the query i.e. namestmt.setInt(2,101);int i=stmt.executeUpdate();System.out.println(i+' records updated');

Example of PreparedStatement interface that deletes the record

PreparedStatement stmt=con.prepareStatement('delete from emp where id=?');stmt.setInt(1,101);int i=stmt.executeUpdate();System.out.println(i+' records deleted');

Example of PreparedStatement interface that retrieve the records of a table

Get Generated Keys From Preparedstatement 2017

PreparedStatement stmt=con.prepareStatement('select * from emp');ResultSet rs=stmt.executeQuery();while(rs.next()){System.out.println(rs.getInt(1)+' '+rs.getString(2));}

Example of PreparedStatement to insert records until user press n

Get Generated Keys From Preparedstatement Iphone

import java.sql.*;import java.io.*;class RS{public static void main(String args[])throws Exception{Class.forName('oracle.jdbc.driver.OracleDriver');Connection con=DriverManager.getConnection('jdbc:oracle:thin:@localhost:1521:xe','system','oracle');PreparedStatement ps=con.prepareStatement('insert into emp130 values(?,?,?)');BufferedReader br=new BufferedReader(new InputStreamReader(System.in));do{System.out.println('enter id:');int id=Integer.parseInt(br.readLine());System.out.println('enter name:');String name=br.readLine();System.out.println('enter salary:');float salary=Float.parseFloat(br.readLine());ps.setInt(1,id);ps.setString(2,name);ps.setFloat(3,salary);int i=ps.executeUpdate();System.out.println(i+' records affected');System.out.println('Do you want to continue: y/n');String s=br.readLine();if(s.startsWith('n')){break;}}while(true);con.close();}}

Get Generated Keys From Preparedstatement Paper