ZADANIE 1:

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package lab01;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author student
 */
public class Lab01 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {

     Connection conn = null;
     Properties connectionProps = new Properties();
     connectionProps.put("user", "inf132310");
     connectionProps.put("password", "inf132310");

try
 {
         conn = DriverManager.getConnection("jdbc:oracle:thin:@//admlab2.cs.put.poznan.pl:1521/dblab02_students.cs.put.poznan.pl", connectionProps);
         System.out.println("Połączono z bazą danych");
         Statement stmt1 = null;
         Statement stmt2 = null;
         ResultSet rs1 = null;
         ResultSet rs2 = null;
         try
         {
             stmt1 = conn.createStatement();
             stmt2 = conn.createStatement();
             rs1 = stmt1.executeQuery("select count(*) as lprac_total from pracownicy");
             rs2 = stmt2.executeQuery("select count(*) as lprac, id_zesp from pracownicy group by id_zesp");
             rs1.next();
             System.out.println("Zatrudniono " + rs1.getInt("lprac_total") + " pracowników, w tym:");
             while (rs2.next()) {
                 System.out.println(rs2.getInt("lprac") + " w zespole " + rs2.getInt("id_zesp") + ",");
             }
         }
         catch (SQLException ex) {
    System.out.println("Bład wykonania polecenia" + ex.toString());
         }
         finally {
             if (rs1 != null) {
                 try
                 {
                     rs1.close();
                 }
                 catch (SQLException e) {
                     /* kod obsługi */
                 }
             }
             if (stmt1 != null) {
                 try {
                 stmt1.close();
                 }
                 catch (SQLException e) {
                     /* kod obsługi */
                 }
             }
         }
     }
catch (SQLException ex) {
         Logger.getLogger(Lab_JDBC.class.getName()).log(Level.SEVERE, "nie udało się połączyć z bazą danych", ex);
         System.exit(-1);
     }
        try {
            conn.close();
            // TODO code application logic here
        } catch (SQLException ex) {
            Logger.getLogger(Lab01.class.getName()).log(Level.SEVERE, null, ex);
        }
        System.out.println("exit db");
    }

}






ZADANIE 2:

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package lab01;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author student
 */
public class Lab01 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {

     Connection conn = null;
     Properties connectionProps = new Properties();
     connectionProps.put("user", "inf132310");
     connectionProps.put("password", "inf132310");

try
 {
         conn = DriverManager.getConnection("jdbc:oracle:thin:@//admlab2.cs.put.poznan.pl:1521/dblab02_students.cs.put.poznan.pl", connectionProps);
         System.out.println("Połączono z bazą danych");
         Statement stmt1 = null;
         Statement stmt2 = null;
         ResultSet rs1 = null;
         ResultSet rs2 = null;
         try
         {
             stmt1 = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY);
             rs1 = stmt1.executeQuery("select nazwisko from pracownicy where etat='ASYSTENT' order by placa_pod desc");
             rs1.last();
             System.out.println(rs1.getString("nazwisko"));
             rs1.absolute(-3);
             System.out.println(rs1.getString("nazwisko"));
             rs1.absolute(-2);
             System.out.println(rs1.getString("nazwisko"));
         }
         catch (SQLException ex) {
    System.out.println("Bład wykonania polecenia" + ex.toString());
         }
         finally {
             if (rs1 != null) {
                 try
                 {
                     rs1.close();
                 }
                 catch (SQLException e) {
                     /* kod obsługi */
                 }
             }
             if (stmt1 != null) {
                 try {
                 stmt1.close();
                 }
                 catch (SQLException e) {
                     /* kod obsługi */
                 }
             }
         }
     }
catch (SQLException ex) {
         Logger.getLogger(Lab_JDBC.class.getName()).log(Level.SEVERE, "nie udało się połączyć z bazą danych", ex);
         System.exit(-1);
     }
        try {
            conn.close();
            // TODO code application logic here
        } catch (SQLException ex) {
            Logger.getLogger(Lab01.class.getName()).log(Level.SEVERE, null, ex);
        }
        System.out.println("exit db");
    }

}


ZADANIE 3:

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package lab01;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author student
 */
public class Lab01 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {

     Connection conn = null;
     Properties connectionProps = new Properties();
     connectionProps.put("user", "inf132310");
     connectionProps.put("password", "inf132310");

try
 {
         conn = DriverManager.getConnection("jdbc:oracle:thin:@//admlab2.cs.put.poznan.pl:1521/dblab02_students.cs.put.poznan.pl", connectionProps);
         System.out.println("Połączono z bazą danych");
         Statement stmt1 = null;
         Statement stmt2 = null;
         ResultSet rs1 = null;
         ResultSet rs2 = null;
         try
         {
             int [] zwolnienia={150, 200, 230};
             String [] zatrudnienia={"Kandefer", "Rygiel", "Boczar"};
             int [] zatrudnienia_id_prac={240,250,260};
             stmt1 = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
             for(int i=0;i<3;i++) {
                stmt1.executeUpdate("delete from pracownicy where id_prac=" + zwolnienia[i]);
                stmt1.executeUpdate("insert into pracownicy(id_prac, nazwisko) values('" + zatrudnienia_id_prac[i] + "', '" + zatrudnienia[i] + "')");
             }
             stmt1.close();
         }
         catch (SQLException ex) {
             System.out.println("Bład wykonania polecenia " + ex.toString());
         }
         finally {
             if (rs1 != null) {
                 try
                 {
                     rs1.close();
                 }
                 catch (SQLException e) {
                     /* kod obsługi */
                 }
             }
             if (stmt1 != null) {
                 try {
                 stmt1.close();
                 }
                 catch (SQLException e) {
                     /* kod obsługi */
                 }
             }
         }
     }
catch (SQLException ex) {
         Logger.getLogger(Lab_JDBC.class.getName()).log(Level.SEVERE, "nie udało się połączyć z bazą danych", ex);
         System.exit(-1);
     }
        try {
            conn.close();
            // TODO code application logic here
        } catch (SQLException ex) {
            Logger.getLogger(Lab01.class.getName()).log(Level.SEVERE, null, ex);
        }
        System.out.println("exit db");
    }

}



ZADANIE 4: