NW Lab Experiments

8/6/2019 NW Lab Experiments

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Ex. No. 1

Implementation of TCP Using SocketsDate :

Aim :

Write a Java program to Implementation of TCP Sockets

Program:

tcpclient.java

import java.io.*;

import java.net.*;

class tcpclient

{

public static void main(String s[]) throws Exception

{

Socket soc=new Socket(InetAddress.getLocalHost(),5000);

OutputStream os=soc.getOutputStream();

DataOutputStream dos=new DataOutputStream(os);

InputStreamReader isr=new InputStreamReader(System.in);

BufferedReader br=new BufferedReader(isr);

InputStream is=soc.getInputStream();

DataInputStream dis=new DataInputStream(is);

while(true)

{

System.out.println("Send : ");

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dos.writeUTF(br.readLine());

System.out.println("Received: "+dis.readUTF(dis));

}

}

}

tcpserver.java

import java.io.*;

import java.net.*;

class tcpserver

{

public static void main(String s[]) throws Exception

{

ServerSocket sersoc=new ServerSocket(5000);

Socket soc=sersoc.accept();

InputStream is=soc.getInputStream();

DataInputStream dis=new DataInputStream(is);

OutputStream os=soc.getOutputStream();

DataOutputStream dos=new DataOutputStream(os);



while(true)

{

System.out.println("Received: "+dis.readUTF(dis));

System.out.println("Send : ");

dos.writeUTF(br.readLine());

}}}

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Output :

tcp server:

C:\Program Files\Java\jdk1.6.0\bin>javac tcpserver.java

C:\Program Files\Java\jdk1.6.0\bin>java tcpserver

Received: mohamed

Send :

Sathak

tcp client:

C:\Program Files\Java\jdk1.6.0\bin>javac tcpclient.java

C:\Program Files\Java\jdk1.6.0\bin>java tcpclient

Send :

mohamed

Received: sathak

Send :

Result :

Thus the given java program was executed and output was verified.

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Ex. No. 2

Implementation of File TransferDate :

Aim :Write a Java program to Implementation of file transfer

Program:

ftpclient.java

import java.io.*;

import java.net.*;

public class ftpc

{

public static int serport=1666;

public static int clientport=1999;

public static DatagramSocket dss;

public static byte buff[]=new byte[1024];public static byte buff1[]= new byte[5000];

public static DatagramPacket dp,dp1;

public static void client() throws Exception

{

int pos=0;

String msg=" ";

System.out.println("Client started");

while(true)

{

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int c=System.in.read();

switch(c)

{

case '1':

System.out.println("Client quits");

return;

case '\n':

String bye=new String(buff);

InetAddress addr=InetAddress.getByName("localhost");

System.out.println(addr);

while(true)

{

dss.send(new DatagramPacket(buff,pos,addr,serport));

dp1=new DatagramPacket(buff1,buff1.length);

dss.receive(dp1);

System.out.println("File Length is"+dp1.getLength());

if(dp1.getLength()>1)

{

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break;

}

case '\r':

break;

default:

buff[pos++]=(byte)c;

}

}

}

public static void main(String args[]) throws Exception

{

dss=new DatagramSocket(clientport);

client();

}

}

ftpserver.java

import java.io.*;

import java.net.*;

public class ftpserver

{

public static int serport=1666;

public static int clientport=1999;

public static DatagramSocket dss;

public static byte buff[]=new byte[1024];

public static byte buff1[]=new byte[5000];

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public static DatagramPacket dp,dp1;

public static void server() throws Exception

{

InetAddress addr=InetAddress.getByName("localhost");

System.out.println(addr);

while(true)

{

try

{

DatagramPacket dp=new DatagramPacket (buff,buff.length);

dss.receive(dp);

String str=new String(dp.getData(),0,dp.getLength());

if(str.equals("bye"))

{

System.out.println("Server quits");

System.exit(0);

}

System.out.println("Filename server received "+str);

InputStream fis= new FileInputStream(str);

int size=fis.available();

System.out.println(size);

for(int i=0;i


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System.err.println(fe);

dss.send(new DatagramPacket(buff1,0,addr,clientport));

}

}

}

public static void main(String args[])throws Exception

{

System.out.println("Server started");

dss=new DatagramSocket(serport);

server();

}

}

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Output :

ftp client:

C:\Program Files\Java\jdk1.6.0\bin>javac ftpclient.java

C:\Program Files\Java\jdk1.6.0\bin>java ftpclient

Client started

murali.txt

localhost/127.0.0.1

File Length is 9

ftp server:

C:\Program Files\Java\jdk1.6.0\bin>javac ftpserver.java

C:\Program Files\Java\jdk1.6.0\bin>java ftpserver

Server started

localhost/127.0.0.1

Filename server received murali.txt

9

Result :


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Ex. No. 3

Implementation of Chat ApplicationDate :

Aim :Write a Java program to Implementation of chat application

Program:

chat.java

import java.net.*;

import java.io.*;

public class chat

{

public static void main(String args[])throws Exception

{

DatagramSocket ioSocket;

String toName="localhost";String userIn;

byte sendBuffer[]=new byte[65535];

DatagramPacket sendPacket=new DatagramPacket(sendBuffer,128);

BufferedReader in=new BufferedReader(new InputStreamReader(System.in));

int ioPort=111,receiverPort=ioPort;

if(args.length>0)toName=args[0];

else

toName="localhost";

if(toName.equals("localhost"))

receiverPort=222;

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try

{

ioSocket=new DatagramSocket(ioPort);

}

catch(Exception e )

{

System.out.println("Exception:"+e);

ioPort=222;

receiverPort=111;

ioSocket=new DatagramSocket(ioPort);

}

System.out.println("chat on port"+ioPort+".Ctrl Z to quit");

new receiver(ioSocket);

while((userIn=in.readLine())!=null)

{

sendBuffer=userIn.getBytes();

sendPacket=new

DatagramPacket(sendBuffer,sendBuffer.length,InetAddress.getByName(toName),rec

eiverPort);

ioSocket.send(sendPacket);

}

System.exit(0);

}

}

class receiver implements Runnable

{

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DatagramSocket rsSocket;

receiver(DatagramSocket rsSocket)

{

this.rsSocket=rsSocket;

new Thread(this).start();

}

public void run()

{

System.out.println("Calling run");

byte receiveBuffer[]=new byte[65535];

DatagramPacket receivePacket=new DatagramPacket(receiveBuffer,128);

while(true)

{

try

{

rsSocket.receive(receivePacket);

}

catch(Exception e)

{

}

System.out.println("Received:"+new

String(receivePacket.getData(),0,receivePacket.getLength()));

}

}

}

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Output :

Port 111:

C:\Program Files\Java\jdk1.6.0\bin>javac chat.java

C:\Program Files\Java\jdk1.6.0\bin>java chat

chat on port111.Ctrl Z to quit

Calling run

Received:aaaaa

bbbbb

Received:ccccc

ddddd

Port 222:

C:\Program Files\Java\jdk1.6.0\bin>javac chat.java

C:\Program Files\Java\jdk1.6.0\bin>java chat

chat on port222.Ctrl Z to quit

Calling run

aaaaa

Received:bbbbb

ccccc

Received:ddddd

Result :


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Ex. No. 4

Simulation of Routing ProtocolsDate :

Aim :

Write a Java program to Implementation of Routing Protocols

Program:

routing.java

import java.io.*;import java.lang.*;

class routing

{

public static void main(String args[])throws IOException

{

int n,i,j,k;

int[][] b=new int[100][100];

int[][] a=new int[100][100];

String n1;

String s1;

System.out.println("enter the number of nodes\n");



n1=br.readLine();

n=Integer.parseInt(n1);

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InputStreamReader isr1=new InputStreamReader(System.in);

BufferedReader br1=new BufferedReader(isr);

for(i=0;i


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for(j=0;ja[i][k]+a[k][j])

a[i][j]=a[i][k]+a[k][j];

}

}

}

for(i=0;i


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}

}

}

}

Output :

C:\Program Files\Java\jdk1.6.0\bin>javac routing.java

C:\Program Files\Java\jdk1.6.0\bin>java routing

enter the number of nodes

3

Enter the distance between the host 1 1 : 2






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2 4 6

8 10 12

14 16 18

the output matrix is:

0 4 6

8 0 12

14 16 0

Result :


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Ex. No. 5

Study of All SQL CommandsDate :

Aim :Study of all SQL Commands

1.Data Definition Language

2.Data Manipulation Language

3.Transaction Control Language

Codings:

CREATE TABLE:

SQL>

create table msec_student_inf

(

s_roll_no varchar2(15) primary key , student_name varchar2(100) not null,

course_id number(4) , batch_inf varchar2(10) , address_inf varchar2(100) ,

contact_inf varchar2(100) , remark varchar2(100));

Table created.

SQL>

create table msec_course_inf ( course_id number(4) primary key,

course_name varchar2(30) not null , course_duration varchar2(30),

univ_regulation varchar2(100) , remark varchar2(100));

Table created.

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CREATE INDEX:

SQL> CREATE INDEX emp_idx1 ON emp (ename, job);

Index created.

DROP INDEX:

SQL>DROP INDEX emp_idx1;

Index dropped.

CREATE VIEW:

SQL>CREATE VIEW EMP_DEPT_VIEW AS SELECT e.empno, e.ename,

d.deptno, d.loc FROM emp e, dept d WHERE e.deptno = d.deptno

View created

ALTER TABLE:

SQL>alter table msec_student_inf modify batch_inf varchar2(50)

Table altered.

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DESC COMMAND:

SQL> desc msec_student_inf

Name Null? Type

----------------------------------------------------- -------- ------------

S_ROLL_NO NOT NULL VARCHAR2(15)

STUDENT_NAME NOT NULL VARCHAR2(100)

COURSE_ID NUMBER(4)

BATCH_INF VARCHAR2(50)

ADDRESS_INF VARCHAR2(100)

CONTACT_INF VARCHAR2(100)

REMARK VARCHAR2(100)

INSERT COMMAND:

SQL>insert into msec_course_inf

Values

(1,'M.E. CSE','2010-2012','ANNA UNIVERSITY OF TECHNOLOGY MADURAI

R2010','REGULAR COURSE');

1 row created.

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COMMIT/SAVEPOINT/ROLLBACK TRANSACTION COMMAND:

SQL>COMMIT;

SQL>SAVEPOINT SP5;

SQL>ROLLBACK TO SAVEPOINT sp5;

SELECT CLAUSE:

SQL>SELECT COURSE_ID,COURSE_NAME,COURSE_DURATION FROM

MSEC_COURSE_INF;

COURSE_ID COURSE_NAME COURSE_DURATION

---------------- ---------------------- ------------------------------

1 M.E. CSE 2010-2012

2 B.E. CSE 2010-2014

3 B.TECH IT 2010-2014

4 M.C.A. 2010-2013

5 M.B.A. 2010-2012


MSEC_COURSE_INF WHERE COURSE_ID = 5;


----------- -------- ------------------------ ------------------------------

5 M.B.A. 2010-2012

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MSEC_COURSE_INF WHERE COURSE_ID < 5;


----------------- ------------------------------ ------------------------------

1 M.E. CSE 2010-2012

2 B.E. CSE 2010-2014

3 B.TECH IT 2010-2014

4 M.C.A. 2010-2013


MSEC_COURSE_INF WHERE COURSE_ID BETWEEN 2 AND 5


----------------- ------------------------------ ------------------------------

2 B.E. CSE 2010-2014

3 B.TECH IT 2010-2014

4 M.C.A. 2010-2013

5 M.B.A. 2010-2012

ORDER BY CLAUSE:

SQL>SELECT * FROM emp WHERE job = 'SALESMAN' ORDER BY comm

DESC;

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AGGREGATE FUNCTION (MIN, MAX, GROUP BY, HAVING):

SQL> SELECT deptno, MIN(sal), MAX (sal) FROM emp WHERE job = 'CLERK'

GROUP BY deptno HAVING MIN(sal) < 1000;

DEPTNO MIN(SAL) MAX(SAL)

--------- --------- ---------

20 800 1100

30 950 950

JOIN CONDITION:

SQL> SELECT ename, job, dept.deptno, dname FROM emp, dept

WHERE emp.deptno = dept.deptno AND job = 'CLERK';

ENAME JOB DEPTNO DNAME

---------- --------- -------------------------

SMITH CLERK 20 RESEARCH

ADAMS CLERK 20 RESEARCH

JAMES CLERK 30 SALES

MILLER CLERK 10 ACCOUNTING

OUTER JOIN CONDITION:

SQL>SELECT ename, job, dept.deptno, dname FROM emp, dept

WHERE emp.deptno (+) = dept.deptno;

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ENAME JOB DEPTNO DNA

---------- --------- -----------------------

CLARK MANAGER 10 ACCOUNTING

KING PRESIDENT 10 ACCOUN

MILLER CLERK 10 ACCOUNTING

SMITH CLERK 20 RESEARCH

ADAMS CLERK 20 RESEARCH

FORD ANALYST 20 RESEARCH

SCOTT ANALYST 20 RESEARCH

JONES MANAGER 20 RESEARCH

ALLEN SALESMAN 30 SALES

BLAKE MANAGER 30 SALES

MARTIN SALESMAN 30 SALES

JAMES CLERK 30 SALES

TURNER SALESMAN 30 SALES

WARD SALESMAN 30 SALES

15 rows selected.

UPDATE RECORD:

SQL>update msec_course_inf set univ_regulation='ANNA UNIVERSITY -

TIRUCHIRAPPALLI' where course_id=5

1 row updated.

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COURSE_ID COURSE_NAME UNIV_REGULATION

----------------- ---------------------- ----------------------------------------

1 M.E. CSE ANNA UNIV OF TECH MADURAI R2010

2 B.E. CSE ANNA UNIV OF TECH MADURAI R2010

3 B.TECH IT ANNA UNIV OF TECH MADURAI R2010

4 M.C.A. ANNA UNIV OF TECHN MADURAI R2010

5 M.B.A. ANNA UNIVERSITY - TIRUCHIRAPPALLI R2009

DELETE CLAUSE:

SQL>delete from msec_course_inf where course_id=1;

1 rows deleted.

COURSE_ID COURSE_NAME UNIV_REGULATION

----------------- ---------------------- ----------------------------------------

2 B.E. CSE ANNA UNIV OF TECH MADURAI R2010

3 B.TECH IT ANNA UNIV OF TECH MADURAI R2010

4 M.C.A. ANNA UNIV OF TECHN MADURAI R2010

5 M.B.A. ANNA UNIVERSITY - TIRUCHIRAPPALLI R2009

Result :

Thus the given SQL commands were studied and output was verified.

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Ex. No. 6

Implementing The Concept of NormalizationDate :

Aim :

Implement the concept of Normalization (1NF,2NF and 3NF), From the given

data elements for customer Invoices.

Normalization:

Normalization is a method for organizing data elements in a

database, into tables. Normalization avoids duplication of data.

Consider the following invoice information that was maintained in Excel.

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Here if we analyze the spread sheet, rows 2,3 and 4 are representing the data for

invoice no=125, which has the data redundancy for customer information. By

implement the normalization, we can identify the required tables from the given set

of data elements by which we can implement coding.

FIRST NORMAL FORM :

No Repeating Elements Or Group Of Elements

Confirms Automicity For Data Elements And Identification Of Primary Keys

Thus the above data elements can be represented as follows, using 1NF.

INVOICES

INVOICE_NO

(PK)

INVOICE_DATE

CUST_ID

CUST_NAME

CUST_ADDR

CUST_CITY

CUST_STATE

ITEM_ID (PK)

ITEM_DESC

ITEM_QTY

ITEM_PRICE

TOTAL_PRICE

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SECOND NORMAL FORM:

No Partial Dependencies On A Concatenated Key(S)

PHASE-I:

Invoice Information And Invoice Item Information Can Be Seperated Into Tables

PHASE II:

Invoice- Item Table Can Be Further Seperated As Item Information And Put Into

Separate Table

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THIRD NORMAL FORM:

No Dependencies On Non-Key Attributes

Here the problem of repeating customer information has to be separated in a table

because if the customer places more number of orders then these information will

be entered again and again.

Codings:

SQL> CREATE TABLE INVOICES

2 (

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3 INVOICE_NO NUMBER(6) PRIMARY KEY,

4 INVOICE_DATE DATE,

5 CUST_ID NUMBER(6));

TABLE CREATED.

SQL> CREATE TABLE INVOICE_ITEM

2 (

3 ITEM_ID NUMBER(6) PRIMARY KEY,

4 INVOICE_NO NUMBER(6),

5 ITEM_DESC VARCHAR2(50) UNIQUE,

6* ITEM_PRICE NUMBER(10,2));

TABLE CREATED.

SQL> CREATE TABLE CUSTOMER

2 (

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3 CUST_ID NUMBER(6) PRIMARY KEY,

4 CUST_NAME VARCHAR2(50) UNIQUE,

5 CUST_ADDR VARCHAR2(50),

6 CUST_CITY VARCHAR2(50),

7 CUST_STATE VARCHAR2(50));

TABLE CREATED.

SQL> CREATE TABLE ITEMS

2 (

3 ITEM_ID NUMBER(6) PRIMARY KEY,

4 ITEM_DESC VARCHAR2(50) UNIQUE,

5 ITEM_PRICE NUMBER(10,2));

TABLE CREATED.

Result :

Thus the given normalization concepts was executed and output was

verified.

Ex. No. 7

Develop A Package To Maintain Its Customer DetailsDate :

Aim :

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Develop a Package for Bank to maintain its Customers detail

Customer Account Opening Form:

Business Rules:

1. Customer Account number is system generated and unique

2. Opening balance is set according to the account type as

Savings bank a/c Rs.5000

Current a/c Rs.1000

Recurring depositRs.100

NRE a/c Rs.250003. Set current bal = opening balance at the opening time

4. All other deposits through transaction only

Transaction Table:

1. Transaction id is system generated

2. Transaction date is system date

3. Transaction is made upon the user input values for transaction type and

transaction amount

4. if trans_type=deposit then amount will be credited

5. if trans_type=withdraw then amount will be debited from main balance.

Table Creation :

Customer Information :

create table bank_cust_inf

(

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cust_acno number(10) primary key,

cust_name varchar2(50) not null,

cust_addr varchar2(50) not null,

cust_phno varchar2(50) not null,

cust_mail varchar2(50) not null,

account_type number(1),

open_bal number(15,2),

current_bal number(15,2),

open_date varchar2(10));

Bank Transaction Information :

create table bank_trans

(

trans_slno number(8) primary key,

trans_date varchar2(10),

cust_acno number(10),

avl_bal number(15,2),

trans_type number(1),

trans_amt number(15,2),

new_bal number(15,2),

remark varchar2(50));

Form design time codings:

Form level triggers:

When-tabpage-changed:

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IF :SYSTEM.TAB_NEW_PAGE='CUST' THEN

GO_BLOCK('BANK_CUST_INF');

EXECUTE_QUERY;

ELSIF :SYSTEM.TAB_NEW_PAGE='TRANS' THEN

GO_BLOCK('BANK_CUST_INF1');

EXECUTE_QUERY;

END IF;

ON-INSERT on customer account opening:

declare

n number;

begin

select count(*) into n from BANK_CUST_INF;

if n>0 then

select max(CUST_ACNO)+1 into :BANK_CUST_INF.CUST_ACNO from

BANK_CUST_INF;

else

:BANK_CUST_INF.CUST_ACNO:=1001;

end if;

insert_record;

end;

TRANSACTION TABLE CODINGS:

BEGIN

SELECT CURRENT_BAL INTO :BANK_TRANS.AVL_BAL FROM

BANK_CUST_INF

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WHERE CUST_ACNO=:BANK_CUST_INF1.CUST_ACNO;

IF :BANK_TRANS.TRANS_TYPE=1 THEN

:

BANK_TRANS.NEW_BAL:=:BANK_TRANS.AVL_BAL+:BANK_TRANS.TRA

NS_AMT;

ELSIF :BANK_TRANS.TRANS_TYPE=2 THEN

:BANK_TRANS.NEW_BAL:=:BANK_TRANS.AVL_BAL -

:BANK_TRANS.TRANS_AMT;

IF :BANK_TRANS.NEW_BAL < :BANK_CUST_INF.OPEN_BAL THEN

:BANK_TRANS.TRANS_AMT:=:BANK_TRANS.TRANS_AMT -

:BANK_CUST_INF.OPEN_BAL;

:BANK_TRANS.NEW_BAL:=:BANK_TRANS.AVL_BAL -

:BANK_TRANS.TRANS_AMT;

END IF;

END IF;

UPDATE BANK_CUST_INF

SET CURRENT_BAL = :BANK_TRANS.NEW_BAL

WHERE CUST_ACNO=:BANK_CUST_INF1.CUST_ACNO;

EXCEPTION

WHEN NO_DATA_FOUND THEN NULL;

WHEN OTHERS THEN NULL;

END;

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POST-QUERY ON TRANSACTION TABLE:

if :bank_cust_inf1.account_type=1 then

:bank_cust_inf1.DSP_AC_TYPE:='Savings Bank Account';

elsif :bank_cust_inf1.account_type=2 then

:bank_cust_inf1.DSP_AC_TYPE:='Current Account';


:bank_cust_inf1.DSP_AC_TYPE:='Recurring Deposit';


:bank_cust_inf1.DSP_AC_TYPE:='NRE/NRO Savings Account';

end if;

Run time Screen Shot(s) Customer Account Opening Form:

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Customer Account Transaction Screen:

Result :

Thus the given package was executed and output was verified.

Ex. No. 8

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Develop A Package For The Payroll of A CompanyDate :

Aim :

Develop a package for the Pay-Roll of a Company

Employee Detail:

1. Empno is system generated and unique

2. Deptno, job title id is lookup field from concerned sub tables

3. Net salary is calculated field as

Net salary= (Basic salary+Overtimepay+Bouns)-Deduction.

4. Over time pay = 1.5 time of Basic pay / hr

Table creation:

Employee information:

SQL>

create table employee_inf

(

empno number(5) primary key,

empname varchar2(100) not null,

join_date varchar2(10) not null,

job_title_id number(2),

deptno number(2),

basic_sal number(10,2),

over_time number(9,2),

bonus number(9,2),

deduction number(9,2),

net_salary number(9,2),

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remark varchar2(100)

);

Table created.

Employee department information:

create table emp_dept

(

deptno number(4) primary key,

dname varchar2(50) unique

);

Table created.

Employee job title informaton:

create table emp_job_title

(

job_title_id number(2) primary key,

job_desc varchar2(50) not null

);

Table created.

Employee overtime information:

SQL>

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create table emp_overtime

(

empno number(5),

ot_date varchar2(10),

ot_hrs number(2),

ot_pay number(10,2),

ot_amt number(10,2)

);

Table created.

SQL>

SQL> INSERT INTO emp_job_title

2 VALUES (1,'MANAGER');

1 row created.

SQL> INSERT INTO emp_dept

2 VALUES (1,'ADMIN');

1 row created.

Form Design Codings:

Form level triggers WHEN-NEW-FORM-INSTANCE:

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set_window_property(forms_mdi_window,window_state,MAXIMIZE);

set_window_property('MAIN',window_state,MAXIMIZE);

declare

n number;

begin

n:=POPULATE_GROUP('RG_EMP');

POPULATE_LIST('EMPLOYEE_INF.EMPNO','RG_EMP');

n:=POPULATE_GROUP('RG_DEPT');

POPULATE_LIST('EMPLOYEE_INF.DEPTNO','RG_DEPT');

n:=POPULATE_GROUP('RG_TITLE');

POPULATE_LIST('EMPLOYEE_INF.JOB_TITLE_ID','RG_TITLE');

END;

WHEN-TAB-PAGE-CHANGED:

IF :SYSTEM.TAB_NEW_PAGE='EMP' THEN

GO_BLOCK('EMPLOYEE_INF');

EXECUTE_QUERY;

ELSIF :SYSTEM.TAB_NEW_PAGE='DEPT' THEN

GO_BLOCK('EMP_DEPT');

EXECUTE_QUERY;

ELSIF :SYSTEM.TAB_NEW_PAGE='JOB' THEN

GO_BLOCK('EMP_JOB_TITLE');EXECUTE_QUERY;

ELSIF :SYSTEM.TAB_NEW_PAGE='OT' THEN

GO_BLOCK('EMPLOYEE_INF1');

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EXECUTE_QUERY;

END IF;

BLOCK LEVEL TRIGGERS ON INSERT:

declare

n number;

begin

select count(*) into n from EMPLOYEE_INF;

if n>0 then

select max(EMPNO)+1 into :EMPLOYEE_INF.EMPNO from employee_inf;

else

:EMPLOYEE_INF.EMPNO:=1001;

end if;

end

insert_record;

Field Level Triggers KEY-NEXT-ITEM (all calculation fields):

:EMPLOYEE_INF.NET_SALARY:=

(NVL(:EMPLOYEE_INF.basic_sal,0)+

NVL(:EMPLOYEE_INF.over_time,0)+NVL(:EMPLOYEE_INF.bonus,0))-

(NVL(:EMPLOYEE_INF.deduction,0));

Employee overtime pay per hour based on basic salary:

:EMP_OVERTIME.ot_pay:=

ROUND((((:EMPLOYEE_INF1.basic_sal*:EMP_OVERTIME.ot_hrs)/208)*1.5),2);

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:

EMP_OVERTIME.ot_amt:=:EMP_OVERTIME.ot_hrs*:EMP_OVERTIME.ot_pay;

Screen Shot:

Search Module :

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Overtime Calculation :

Monthly Pay-Roll Preperation :

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Result :

Thus the given package was executed and output was verified.

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Ex. No. 9

Implement The Inventory Control System With A

Reorder LevelDate :

Aim :

Implement the Inventory Control System with Re-order level

Inventory Master:

Business Rules:

1. Min Qty = 10 and Max Qty = 100

2. New item can be inserted through this module but update through transaction

only

3. Delete operation is not allowed until all transaction entries are cleared, to

maintain integrity constraints.

4. Re-Order level condition : if avl_qty=max_qty;

Inventory Transaction:

1. Check for the item availability

2. if the item is available, then check for re-order level

3. if the item can be issued, allow transaction

4. update master file with the current avl qty

5. no transaction could be modified from transaction screen

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Create table:

Master Information:

create table inventory_master

(

item_code number(5) primary key,

item_name varchar2(30) not null,

unit_price number(7,2),

avl_qty number(5),

min_qty number(3),

max_qty number(5),

supp_inf varchar2(100),


Transaction Information

create table inventory_trans

(

trans_slno number(8) primary key,

trans_date varchar2(10) default to_char(sysdate,'dd/mm/yyyy'),

item_code number(5),

trans_qty number(5),

trans_amt number(7,2),


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Design time Codings:

Form level triggers when new form instance:

set_window_property(forms_mdi_window,window_state,MAXIMIZE);

set_window_property('MAIN',window_state,MAXIMIZE);

declare

n number;

begin

n:=POPULATE_GROUP('RG_ITEM');

POPULATE_LIST('INVENTORY_TRANS.ITEM_CODE','RG_ITEM');

END;

IF :SYSTEM.MODE='NORMAL' THEN

:INVENTORY_MASTER.MIN_QTY:=10;

:INVENTORY_MASTER.MAX_QTY:=100;

END IF;

When tab page changed:

IF :SYSTEM.TAB_NEW_PAGE='MASTER' THEN

GO_BLOCK('INVENTORY_MASTER');

EXECUTE_QUERY;

ELSIF :SYSTEM.TAB_NEW_PAGE='TRANS' THEN

GO_BLOCK('INVENTORY_TRANS');

EXECUTE_QUERY;

END IF;

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On Insert trigger on inventory master (item code):

declare

n number;

begin

select count(*) into n from inventory_master;

if n>0 then

select max(item_code)+1 into :inventory_master.item_code from inventory_master;

else

:inventory_master.item_code:=1;

end if;

insert_record;

end;

Transaction module codings:

begin

select unit_price,avl_qty into :inventory_trans.dsp_up,:inventory_trans.dsp_avl from

inventory_master

where item_code=:inventory_trans.item_code;

exception when no_data_found then null;

when others then null;

end;

:inventory_trans.trans_amt:=:inventory_trans.trans_qty*:inventory_trans.dsp_up;

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On delete entry

UPDATE INVENTORY_MASTER

SET AVL_QTY=AVL_QTY+:INVENTORY_TRANS.TRANS_QTY

WHERE ITEM_CODE=:INVENTORY_TRANS.ITEM_CODE;

delete_record;

Post insert:

UPDATE INVENTORY_MASTER

SET AVL_QTY=AVL_QTY-:INVENTORY_TRANS.TRANS_QTY

WHERE ITEM_CODE=:INVENTORY_TRANS.ITEM_CODE;

Post Query:

begin

select unit_price,avl_Qty

into :inventory_trans.dsp_up, :inventory_trans.dsp_avl

from inventory_master where item_code = :inventory_trans.item_code;

exception

when no_data_found then null;

when others then null;

end;

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Runtime Screen Shot(s):

NW Lab Experiments

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Transcript of NW Lab Experiments