Enquirys Project Documentation

8/22/2019 Enquirys Project Documentation

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SUBMITTED TO

CENTRAL BOARD OF SECONDARY EDUCATION,

CHENNAI

ENQUIRIES DATABASE

INFORMATICS PRACTICES

(CLASS XII)

2011-2013

Submitted To: Submitted By:

Department of

Informatics Practices Name:

Reg.No:

MP & EV ENGLISH MEDIUM SCHOOL

VISAKHAPATNAM

YEAR 2011-2013


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CERTIFICATE

This is to certify that the project entitled ENQUIRIES

DATABASE MANAGEMENT SYSTEM is a work of

_________________________________________________ with

registration number _____________done as practical fulfillment of

the requirement for the award of the Class-XII from MP & EV

ENGLISH MEDIUM SCHOOL for the academic year 2011-2013.

HEAD OF THE DEPARTMENT(INFORMATICS PRACTICES)

EXTERNAL EXAMINER INTERNAL EXAMINER


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ACKNOWLEDGEMENT

I am greatly indebt towards the principal of MP & EV ENGLISH

MEDIUM SCHOOL for giving me an opportunity in elaborating my

knowledge towards this subject (INFORMATICS PRACTICES) by

completing this project work. I would like to thank all my teachers

under whose able guidance. I was able to complete this project work.

I express my sincere thanks and gratitude towards our lecturer Srinivas

Kumar sir for his support and guidance through out the project. I would

also like to thank our beloved project guidance teacher who have

encouraged and co-operated with me during this project.

By

Name :

Reg. No. :


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INDEX

1. Abstract

2. Literature Survey

a. My SQL

b. Java

3. Software Requirement Specification

4. Data Flow Diagram

5. Sample Forms

6. Sample Code

7. Table Code

8. Bibliography


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ABSTRACT

My project titled ENQURIES was developed to computerize the existing

system of maintaining the records of the enquiries. This project is preparedwith a view of reducing the burden of manual procedures by adopting

modern methods of automation, which is expected to encompass the entire

operation

First step towards achieving this goal is to organize the information At hand

in a logical manner so as to insure easy access, retrieval and Update of data.

For this we create separate tables to represent entities Involved S.no,

Enquiry date, name. Address, sex, age, phone, school

The following pages will give you a overview of how the database

Software for Student enquiries has been designed.

The main advantages of using this system are

Manpower required maintaining database is greatly reduced. Improves the work efficiency in enquiry of students Less prone to error Stops redundancy it provides you with a user name and password for data

security

Reduces cost in maintaining data We can develop various reports like

Date wise Report

Name wise Report

All the Enquiries

Instant details about the students can be retrieved. It helps in easy updating of the database with Update/Add option.


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LITERATURE

SURVEY


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My SQL

Introduction

The collection of data, usually referred to as the database, contains

information about the particular enterprise. A database management system

(DBMS) consists of a collection of interrelated data and a set of programs to

access those data. The primary goal of a DBMS is to provide an

environment that is both convenient to use in retrieving and storing database

information. The modern database system is one of the most powerful tools

you can use to build business applications.

DBMS

In the last two decades, with the rapid and steady growth of

computerization, organizations have realized the value of information As a

resource and the importance of the speed and ease with which raw data can

be processed into useful information.

To optimally exploit this potential of the information, organization have

committed large amounts of funds towards the collection of the data and

keeping this data up to date, by investing on the people, hardware and the

software to manage this data. This set of interrelated data are is known as

database and the softer that manages it once interrelationships are specified,

is known as database management system DBMS


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DBMS can be described as a computer based record keeping system, which

consists of software for processing a collection of interrelated data. The

data is completely managed by the DBMS, and can be accessed by end users

via application programs developed by designers and programmers.

Application programs are typically required to capture data, update it,

periodically clean it up, and to present it as information after processing it

meaningfully. The designers and programmers use a combination of high

languages (such as COBOL, c, FORTRAN) and fourth generation language

(4GL such as SQL) tools to build these application programs.

A person called database administer or DBA centrally manages the database

.The DBA decides on the type of the data that Is to be held the structures in

which it is to be held the structures in which it is to be held and the

interrelations between data structures and defines these to the DBMS. The

DBA usually controls access to the data thorough user codes and passwords

and by restricting the types of operations that they can perform on it .The

DBA also uses certain tools available with DBMS to fine tune the database

so that information is available immediately on requirement.

Designers and programmers help DBA is structure and optimizing the

database design. They also develop application system for end user.

Need for DBMS:

The main reason to choose a database system is, it provides a centralized

control of its operational data-which is one of its most valuable assets. Some

of the advantages that can be occurred from having centralized control of

the data are:


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Characteristics of DBMS

The predominant advantages of DBMS are discussed below.

1. Redundancy can be reduced

2. Inconsistency can be avoided

3. Data can be shared

4. Standards can be enforced

5. Security restrictions can be applied

6. Integrity can be maintained

7. Data independence

8. Processing speed

9. Hardware Independence

Introduction to RDBMS

The My SQL database was designed using the relational model and gives

users many advantages

A database structure that is easy to visualize and understand

The ability to create any number of temporary relationships

between tables.

Freedom from concerns about how to query the database, through

use of SQL.

Tables easy to visualize

Relational joins that provide temporary sets of data from multiple

tables in the model


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What is a relational database?

IBMs, Dr E.F.Codd first proposed the relational model in 1970, but it had

little practical significance until relational DBMS products becomes

available in the 1980s. Dr. Codd in 1985 paper laid out 12 rules for

relational database.

In the relational model, only one type of data structures exists-the table .The

uniformity of the relational model gave rise to a new type of high -level

database language produces new tables by sub setting and/or combining

existing tables. By issuing a single language command, you can retrieve an

entire set of record (called rows) from one or more existing tables into a new

table (called a result table) that you can in turn operate once again. This set-

a -time approach means that single relational command can retrieve, update

or delete multiple records stored in the database. Also you specify

operations in terms of what is to be done, not how to do it. In other words, a

relational language is non-procedural as well as set-a-time.

In the relational model, the relationships between tables are created on a

temporary basis by an end users request for information. These temporary

relationships can be setup in several ways many parents/many children, one

parent/many children, one parent/one child-depending on the query used.

The main advantage of this kind of database is that any column in any table

can be directly related to any other column in the table.

Both the network and hierarchical models require that relationships be

predefined. Adding new relationships to an already existing database is


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more difficult with these two models than it is using the relational model.

Unlike the relational model, where the relation ships are established by data

values, the hierarchical and network models represent relationships by

means of separate data structures, such as indexes and linked lists. These

data structures must be established by the DBMS before the relationship can

be present.

Relational Structure

The organizing principle in a relational database is the table; a rectangular

row-column arrangement of data values, each table in a database has a

unique table name that identifies its contents. A relation is a formal for a

table.

The row (or record) in the table is formally called a tuple. Each column in a

table has a column name. The columns of a table must all different names.

The column (or field) is formally called an attribute. The number of tuple is

called the cardinality and the number of attributes is called the degree.

One important property of a relation is that the rows are unordered. A row

cannot be identified by its position on the table. Every table must have some

column or combination of columns that uniquely identify each row in the

table. At any given time, no two rows of the table contain the same values in

that column or column combination. This column (or columns) is called

primary key of the table. A table where every row is different from all other

rows is called a relation in mathematically terms. In relational systems,


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missing or unknown information can be presented as NULL. If a row has

the value NULL is not the same as spaces or zero.

Introduction to My SQL

My SQL is a relational database management system or RDBMS for short.

My SQL being and RDBMS stores data in tables called relations. These

relations are two-dimensional representations of data where the rows called

tuples in relational jargon - represent record, and the columns attributes are

pieces of information contained in the record. My SQL provides a rich set of

tools to allow design, and maintenance, of this database.

Benefits of SQL

Non-procedural language

Common language for all databases i.e. portable and it requires only small

modification to make use in other database. Very simple commands for

querying, inserting, deleting and modifying data and objects

Integrity Constraints

It is a mechanism used by My SQL to prevent invalid data entry into the

table. The following are the various types of integrity constraints.

Domain integrity constrains

NOT NULL

CHECK


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Entity integrity constrains

Maintain uniqueness in a record

UNIQUE CONSTRAINT

PRIMARY KEY CONSTRAINT

Relational Integrity constraints

Enforces relationship between tables.


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JAVA

Java was conceived by James Gosling, Patrick Naughton, Chris Warth, Ed

Frank and Mike Sheridan at Sun Microsystems Inc.in 1991. It took 18

months to develop the first working version. This language was initially

called Oak but was renamed as Java in 1995. Between the initial

implementation of Oak in the fall of 1992 and the public announcement of

Java in the spring of 1995, many more people contributed to the design and

evolution of the language.

The main properties of the Java, which made Java so popular, are as follows:

1. Simple and Secure

2. Portable and Dynamic

3. Object-Oriented

4. Robust

5. Multithreaded

6. Architecture-Neutral

7. Interpreted

8. High performance

9. Distributed

The most striking feature of the language is that is a platform-neutral

language. Java is first programming language that is not tied to any

particular hardware or operating system. Programs developed in Java can be

executed anywhere on any system.


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THE KEY FEATURES OF JAVA IS BYTE CODE:

The key that allows Java to solve both the security and the portability

problems just described is that the output of a Java compiler is not

executable code. Rather, it is Byte code. Byte code is a highly optimized set

of instructions designed to be executed by the Java runtime systems, which

is called the Java Virtual Machine (JVM). That is, in its standard form, the

JVM is an interpreter for Byte code. This may come has a bit of surprise.

Translating a Java program into a byte code helps and makes it much easier

to run a program in a wide variety of environments. The reason is

straightforward only the JVM needs to be implemented for each platform.

Once the runtime package exists for a given system, any Java program can

run on it. Remember, although the details of the JVM will differ from

platform to platform, all interpret the same Java Byte code.

JAVA ENVIRONMENT:

Java environment includes a large number of development tools and

hundreds of classes and methods. The development tools are the part of the

system known as Java Development Kit (JDK) and the classes are methods

are part of the Java standard library (JSL), also known as the Application

Programming Interface (API).


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JAVA DEVELOPMENT KIT:

The Java development kit comes with a collection of tools that are used for

developing and running Java programs. They include:

1. Applet Viewer (for viewing Java Applets)

2. Javac (Java Compiler)

3. Java (Java interpreter)

4. Javap (Java Disassembler)

5. Javah (for C header files)

6. Javadoc (for creating HTML documents)

7. Jdb (Java Debugger)

APPLICATION PROGRAMMING INTERFACE:

The Java standard library includes hundreds of classes and

methods grouped into several functional packages. Most commonly used

packages are:

1. Language support package: A collection of classes and methods

required for implementing basic features of java.

2. Utilities package: A collection of classes to provide utility functions

such as date and time functions.

3. Input/Output package: A collection of classes required for input &

output manipulations.

4. Networking package: A collection of classes for communication with

other computers via Internet.

5. AWT package: The abstract window toolkit package contains classes

that implements platform independent graphical user interface.


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JAVA DATABASE CONNECTIVITY (JDBC)

The Java database connectivity Application Programming Interface (API) is

an API currently being designed by Sun Microsystems that provides a Java

language interface with SQL Call Level Interface standard. This standard

provides a DBMS independent interface to relational databases that defines a

generic SQL database access framework.

The most visible implementation of the SQL CLI is Microsofts ODBC

(Open Database Connectivity). This API defines a common SQL syntax and

function calls that can be used by developers to send SQL commands to and

retrieve data from SQL databases. ODBC - enabled applications make use of

database drivers (similar to other device drivers) installed on the system that

allows applications to talk to a vendors database. Using this methodology,

all of the DBMS specific code is placed inside the ODBC driver and the

application developer is shielded from implementation specific problems in

theory. Practically speaking, it is sometimes difficult to completely remove

vendors specific syntax from all ODBC operations, but in most cases, it is

relatively simple task to port ODBC to run on a new database server.

ODBCs primary drawback is that it is written in C. Because of the

limitations inherent in the use of native methods, the JDBC designers have

designed the JDBC specification to most easily use ODBC in short-term, but

they have provided the capability long-term for JDBC to be implemented in

other ways.


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NOTE: JDBC, like ODBC, is designed to be a Call Level SQL Interface.

Because many of its many of its low-level operations can be combined into a

higher level, object oriented interface, except to see Java class libraries

released in the future that provide a mapping to the underlying JDBC Calls.

This happened with ODBC almost immediately, and the majority of ODBC

developers currently use other Interface rather than using ODBC API

directly.

The JDBC API is expressed as a series of abstract Java interfaces within the

java.sql package. Here are the most commonly used interfaces:

java.sql.DriverManager manages the loading and unloading of database

drivers from the underlying systems.

java.sql.Connection Handles the connections to a specific database.

java.sql.Statement contains an SQL statement to be passed to the

database: two sub-types in this interface are the PreparedStatement (for

executing a Pre-Compiled SQL statement) and the CallableStatement (for

executing a database stored procedure).

java.sql.ResultSet contains the record result set from the SQL statement

passed to the database


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HARDWARE AND SOFTWARE

REQUIREMENTS

Hard ware Specification:

Processor : Dual Core

Processor Speed : 1.0MHz

RAM : 512MB

Hard Disk : 160GB

Software Specification

Language : JDK 1.6

Database : My SQL

IDE : Netbeans 6.0

Operating System : Windows XP


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Sample Forms


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private void LogInBActionPerformed(java.awt.event.ActionEvent evt) {

String PWord = PassWordTF.getText();

String ID = IDTF.getText();

String str = null;

Statement stmt=null;

ResultSet rs = null;

try {

Class.forName("java.sql.Driver");

String database = "jdbc:mysql://localhost:3306/enquirys";

Connection conn = DriverManager.getConnection(database, "root", "root");

stmt = conn.createStatement();

String sql = "select * from LogIn where ID = '" + ID + "'";

rs = stmt.executeQuery(sql);

rs.next();

str = rs.getString("Password");

rs.close();

stmt.close();

conn.close();

if(str.equals(PWord)) {

MainMenu m = new MainMenu();

m.setVisible(true);

this.dispose();

} else {

InvalidL.setText("Incorrect ID or Password");

}

} catch (Exception e) {

JOptionPane.showMessageDialog(null, e); InvalidL.setText("Incorrect ID or Password");} }


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private void addBtnActionPerformed(java.awt.event.ActionEvent evt)

{

AddEnquiry m = new AddEnquiry();

m.setVisible(true);

this.setVisible(false);

}

private void ReportsBtnActionPerformed(java.awt.event.ActionEvent evt)

{

Report m = new Report();

m.setVisible(true);


}

private void exitBtnActionPerformed(java.awt.event.ActionEvent evt)

{

this.dispose();

}


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private void returnBtnActionPerformed(java.awt.event.ActionEvent evt) {

new MainMenu().setVisible(true);


}


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private void saveBtnActionPerformed(java.awt.event.ActionEvent evt) {

char gender = 'M';

if (MaleRB.isSelected()) {

gender = 'M';

} else if (FemaleRB.isSelected()) {

gender = 'F';

}

int age = Integer.parseInt(AgeTF.getText());

try {

Class.forName("com.mysql.jdbc.Driver");

String database = "jdbc:mysql://localhost:3306/Enquirys";


Statement stmt2 = conn.createStatement();

String sql2 = "Select count(*) from Enquirys";

ResultSet rs = stmt2.executeQuery(sql2);

rs.next();

int bno = rs.getInt(1) + 1;

Statement stmt = conn.createStatement();

String sql = "Insert into Enquirys values (" + bno + ", '" + DOEtxt.getText() + "', '" +

nameTF.getText() + "' , '" + AddressTF.getText() + "' , '" + gender + "' , " + age + " , '" +

PhoneTF.getText() + "' , '" + SchoolTF.getText() + "' )";

JOptionPane.showMessageDialog(null, sql);

stmt.executeUpdate(sql);

JOptionPane.showMessageDialog(null, "Enquiry Number " + bno + " is inserted");

stmt.close();

stmt2.close();

conn.close();


JOptionPane.showMessageDialog(null, "Invalid Data" + e);

}

}


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private void loadBtnActionPerformed(java.awt.event.ActionEvent evt) {

String str = JOptionPane.showInputDialog("Enter Enquiry No.");

int n = Integer.parseInt(str);

try {




Statement st = conn.createStatement();

String sql = "Select * from Enquirys where sno=" + n;

ResultSet rs = st.executeQuery(sql);

if (rs.next()) {

jTextField1.setText(rs.getString("sno"));

DOEtxt.setText(rs.getString("DOE"));

nameTF.setText(rs.getString("name"));

AddressTF.setText(rs.getString("addres"));

if (rs.getString("sex").equals("M")) {

MaleRB.setSelected(true);

} else {

FemaleRB.setSelected(true);

}

AgeTF.setText(rs.getString("age"));

PhoneTF.setText(rs.getString("phone"));

SchoolTF.setText(rs.getString("school"));

}

st.close();

conn.close();



}

}


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private void updateBtnActionPerformed(java.awt.event.ActionEvent evt) {

char gender = 'M';

int n = Integer.parseInt(jTextField1.getText());

if (MaleRB.isSelected()) {

gender = 'M';

} else if (FemaleRB.isSelected()) {

gender = 'F';

}

int age = Integer.parseInt(AgeTF.getText());

try {




Statement stmt2 = conn.createStatement();

String sql2 = "Delete from Enquirys where sno=" + n;

stmt2.execute(sql2);

Statement stmt = conn.createStatement();

String sql = "Insert into Enquirys values (" + n + ", '" + DOEtxt.getText() + "', '" +

nameTF.getText() + "' , '" + AddressTF.getText() + "' , '" + gender + "' , " + age + " , '" +

PhoneTF.getText() + "' , '" + SchoolTF.getText() + "' )";

JOptionPane.showMessageDialog(null, sql);

stmt.executeUpdate(sql);

JOptionPane.showMessageDialog(null, "Enquiry Number " + n + " updated");

stmt.close();

stmt2.close();

conn.close();



}

}


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void showEnquiries()

{

String query;DefaultTableModel model = (DefaultTableModel)jTable1.getModel();

try{


Connection con =

DriverManager.getConnection("jdbc:mysql://localhost:3306/Enquirys","root","root");

Statement st = con.createStatement();

String doe,sex;doe =(String) DOEComboBox.getSelectedItem();

sex =(String) SexComboBox.getSelectedItem();

while(jTable1.getRowCount()>0)

model.removeRow(jTable1.getRowCount()-1);

query = "Select * from Enquirys";

if(!doe.equals("ALL"))

query = query +" where DOE='"+doe+"'";

ResultSet rs = st.executeQuery(query);

while(rs.next())

{

String a = rs.getString(1);

String b = rs.getString(2);

String c = rs.getString(3);

String d = rs.getString(4);

String e = rs.getString(5);

String f = rs.getString(6);


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String g = rs.getString(7);

String h = rs.getString(8);

Object ob[] = {a,b,c,d,e,f,g,h};

model.addRow(ob);

}

rs.close();

st.close();

con.close();

}catch(Exception e)

{

JOptionPane.showMessageDialog(null,e);

}

}

private void showButtonActionPerformed(java.awt.event.ActionEvent evt) {

showEnquiries();

}


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private void formWindowGainedFocus(java.awt.event.WindowEvent evt) {

DOEComboBox.removeAllItems();

try{


Connection con =

DriverManager.getConnection("jdbc:mysql://localhost:3306/Enquirys","root","root");

Statement st = con.createStatement();

String query = "Select DISTINCT DOE from Enquirys";

ResultSet rs = st.executeQuery(query);

DOEComboBox.addItem("ALL");

while(rs.next())

{

DOEComboBox.addItem(rs.getString(1));

}

rs.close();

st.close();

con.close();

}catch(Exception e)

{

JOptionPane.showMessageDialog(null,e);

}

}


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Queries

create database Enquirys;

use Enquirys;

create table Login

(

ID varchar(20) primary key,

Password varchar(20)

)Engine=InnoDB;

insert into login values('CBSE',CBSE');insert into login values('kumar','kumar');

create Table Enquirys

(

Sno int primary key,

DOE date not null,

Name varchar(50),

Addres varchar(50),

Sex char(1),

Age int,

Phone varchar(20),

School varchar(20)

)Engine=InnoDB;

INSERT INTO ENQUIRYS VALUES (1,"2013-01-21","SRI RAM", "Visakhapatnam", "M", 16,

"9898598985","Tempany School");

INSERT INTO ENQUIRYS VALUES (2,"2013-01-21","SRI DEVI", "Visakhapatnam", "F", 16,

"9893598985","VISAKHA VALLEY");


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Bibliography

1. Google.com

2. W3schools.com

3. Sun.com

4. Mysql.com

5. Netbeans.org

Enquirys Project Documentation

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