This document summarizes Day 2 of an event on advanced web development and building a real-time chat application. It discusses different database types including SQL, NoSQL, key-value databases and introduces Firebase as a backend service. Firebase features like Realtime Database, Firestore, and Authentication are explained. The agenda for Day 2 includes topics on SQL vs NoSQL databases, introducing backend development, and using Firebase for databases and authentication. The document concludes with a recap of Day 1 content and inviting attendees to ask any doubts.

1. We’ll be starting the session shortly!
Please keep yourself on MUTE

2. Advanced Web dev and
Real Time chat Application Day 2

3. Who are we?
Amit Patil
● Technical Team 1
Member ,GDSC
BVCOENM

4. Who are we?
Nikhil Sawant
● Technical Team 1
Member ,GDSC
BVCOENM

5. DAY 1
Event Agenda
Why to learn Web
Development?
What is Web
Development?
Real time Chat
Application Demo
Live Coding on
building frontend of
app

6. DAY 2
Event Agenda
SQL and NoSQL
Database
Introduction to
Backend
Firebase for database
and authentication
Live Coding on
completing backend
of the App

7. RECAP OF DAY 1

8. What is a database?
A Database is a collection of related data
organised in a way that data can be easily
accessed, managed and updated.
What is a Data?
Data is nothing but facts and statistics stored or
free flowing over a network, generally it's raw and
unprocessed.
Data becomes information when it is processed,
turning it into something meaningful.
Database Types

9. SQL:- Structured Query Language
1. SQL databases are primarily called as Relational
Databases.
2. Data is stored in form of traditional 2 dimensional
row-column structure
3. All Relational Databases use Common Sub Language
Keywords:
a. Data Manipulation Language (SELECT, INSERT,
UPDATE, DELETE)
b. Data Definition Language (CREATE, ALTER,
DROP)
c. Data Control Language (GRANT, REVOKE)
An example Table Structure:-

10. NoSQL:-
NoSQL, is basically a database used to manage huge sets of
unstructured data, where in the data is not stored in tabular
relations like relational databases.
Most of the currently existing Relational Databases have failed
in solving some of the complex modern problems like :
❏ Continuously changing nature of data.
❏ Applications now serve millions of users in different geo-
locations.
❏ Applications are becoming more distributed.
Key-Value Database
Structure:-

11. Firebase
1. The Firebase Realtime Database is a cloud-hosted NoSQL database
that lets you store and sync between your users in real-time.
2. With just a single API, the Firebase database provides
your app with both the current value of the data and
any updates to that data.
1. The Realtime Database can also integrate with Firebase
Authentication to provide a simple and intuitive
authentication process.

12. Firestore
1. Cloud Firestore is Firebase’s enhanced version of the realtime
database. It is a NoSQL, Horizontally scaling, document model
database in the cloud which makes it very lucrative for developing
fast, realtime, and scalable mobile and web apps.
2. In Cloud Firebase data is stored as a JSON object but it is
generalized into Documents and Collections.
Here are the common
Jargons used in cloud
Firestore:
a. Collection
b. Document
c. Map

13. Authentication
❏ Authentication is the process of verifying
the identity of user or information.
❏ User authentication is the process of
verifying the identity of user when that user
logs into a computer system.
Why Authentication is
required?
❏ The main objective of authentication is
to allow authorized users to access the
computer and to deny access to the
unauthorized users.
❏ Firebase Authentication provides
backend services, easy-to-use SDKs,
and out-of-the-box user interface
libraries to authenticate users of your
application.

14. Day 2 Backend
Live Coding

15. ASK YOUR DOUBTS!