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Day-1_Introduction_To_Database.txt
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Day-1_Introduction_To_Database.txt
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"Welcome To Ashok IT"
"Oracle Database"
Topic : Introduction To Database
Date : 14/11/2022
(Session - 01)
______________________________________________________________________________________________________________________________________
Today Session
==============
1) Course Content
2) Course Duration
3) Introduction To Database Concepts
4) prequisite for this training
5) QA Session
Downloading Course Content : https://ashokitech.com/uploads/course/1726243158_1667612569.pdf
Course Duration : 1 Month +/- 10 Days
Prequisite For Training : Nothing
Session Timings Fixed : 9PM To 10PM (+ / - 10 Mins), Monday- Saturday
++++++++++++++++++++++++++++++++++
Introduction To Database Concepts
++++++++++++++++++++++++++++++++++
*************************************************************************
1) Understanding the Data & Database & Database Management System (DBMS)
*************************************************************************
Data >> Information about any Real World Object.
Ex: Chairs,Tables,Mobiles,Computers,Laptop,Student,Employee,Customer etc.,
Example : If we are considering the College Management System of Student
Student
=======
RollNo,Name,Branch,Gender,Age ---> Data (It is Something particular about one student)
Database >> Grouping of Data in structured Format (or) Grouping of Several Students information.
Student-1 Student-2 Student-3
========= ============ ===========
RollNo :1121 RollNo:2255 RollNo:8989
Name :Mahesh Name :Suresh Name : Rajesh
Branch :CSE Branch:IT Branch: ECE
Gender : Male Gender : Male Gender : Male
Age :28 Age :29 Age :30
Database Management System(DBMS) >> It is atechnique for Storing and Retreiving the Information from Database.
In this Digitial Era (or) In our Day-2-Day life we are seeing the lot of application such as
naukri portal,monster portal,Flipkart,Amazon,ashokittech portal etc.,
EndUser >> Interacting the Applications >> Runs in Server at Remote Machine >> Servers Connected
To Database(Managing the Information of an Application)
********************************************
2) Various Techniques for Managing the Data
********************************************
>> Traditional Approach >> Books (or) Ledger Books >> Collection of Pages >> Each Page >>
one Student Information
Problems
========
1) Security Challenges
2) Backup issues
3) Space issues
4) Costly
5) Time consuming for retrieving particular Student Information.
>> In the 1940's computers was discovered and people are thinking to store this kind of information in computer.
>> After discovering the computer the people are managing the data in the form Of Files (or) File System (or) Flat Files.
Problems
=========
1) Security Challenges
2) Data Redundancy >> Duplication of Data (or) Repeatitive Data
Students.txt StudentBranches.txt
============= ===================
StudentId StudentName StudentId Branch Name
--------- ----------- --------- -----------
3) Data Inconsistency : When ever we are updating studentId in One file may forget to update in another File
Students.txt StudentBranches.txt
============= ===================
StudentId StudentName StudentId Branch Name
--------- ----------- --------- -----------
4) Time Consuming For Storing and Retrieving Information from Files(or) FileSystem (or) Flat Files
5) We can't maintaing the Backups of files
6) We can store limited amount of Information only in files etc.,
Database Softwares
==================
* Currently In Market we are managing the data of an application in Database Softwares
Advantages
==========
1) Strong Security(Username and password)
2) Manage and Storing and Retreving the Information
3) We can store the huge Amount of Information in Database.
4) We can maintain the data in database in structured format(Tables(Rows and Columns)).
Table >> RealWorld Entity >> Student
Columns >> Fields >> Rollno,Name,branch,gender
Rows >> Values >> 123,Mahesh,CSE,Male
5) No Data Redundancy
6) Data Integrity
7) Associations
*********************
3) Database Softwares
*********************
> Oracle Database >> oracle Corporation >> Propertiary License
> MySQL Database >> Oracle Coroporation >> Open Source
> DB2 Database >> IBM Corporation
> SQL Server Database >> Microsoft Corporation
> Derby Database >> Sun MicroSystem
> PostgreSql Database etc.,
NOTE:
=====
** The above all the database softwares are comes under "RDBMS Database Software".
******************************
4) Types of Database Softwares
******************************
* We have two types of Database Softwares
1) RDBMS Database Software
2) NRDBMS Database Software
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++