A blockchain is a database or a ledger that stores information in a data structure called blocks. It is based on distributed ledger technology which can be used between parties that don’t trust each other with data. It is because when you add anything onto the blockchain, it requires verification from all other users available on the network.
Blockchain keeps information permanently in uniformly sized blocks, where each block stores the hashed information from the previous block to provide cryptographic security. The blockchain hashing uses SHA256 hashing algorithm, which is a one-way hash function. The hashed information is the data and a digital signature from the previous block. The hashes of previous blocks that go back to the very first block produced in the blockchain are known as the genesis block. A blockchain data structure is in the form of a Merkle Tree, which is used as an efficient way to verify data.

Advantage of Blockchain

Blockchain technology has become popular because of the following.
• Time reduction: In the financial industry, blockchain can allow the quicker settlement of trades. It does not take a lengthy process for verification, settlement, and clearance.
• Unchangeable transactions: Blockchain only allows insertion of data, which means when a new block is added to the chain of ledgers, it cannot be removed or modified.
• Reliability: Blockchain certifies and verifies the identities of each interested parties. This removes double records, reducing rates and accelerates transactions.
• Security: Blockchain uses very advanced cryptography to make sure that the information is locked inside the blockchain. It uses Distributed Ledger Technology where each party holds a copy of the original chain, so the system remains operative, even the large number of other nodes fall.
• Decentralized: It is because there is no central authority supervising anything. There are standards rules on how every node exchanges the blockchain information.

Databases

A database is a kind of central ledger where the administrator manages everything. Here the administrator gives rights to read, write, update, or delete operation. Since it is centralized in nature, their maintenance is easy, and output is high. But it also has a drawback which, when corrupted, can compromise the entire data and can even change the ownership of digital records.
A database uses a client-server network architecture. Here database administrator has rights to make changes in any part of the data and its structure.

Advantage of Database
The database has become popular because of the following.
• Controls database redundancy: It is because it stores all the data in one single database file and that recorded data is placed in the database.
• Data sharing: In DBMS, the authorized users of an organization can share the data among multiple users.
• Easily Maintenance: It can be easily maintainable due to the centralized nature of the database system.
• Reduce time: It reduces development time and maintenance need.
• Backup: It provides backup and recovery subsystems which create an automatic backup of data from hardware and software failures and restores the data if required.
• Multiple user interfaces: It provides different types of user interfaces like graphical user interfaces, application program interfaces.

Blockchain vs Database

We can see the difference between blockchain and database in the below table.

SN	Blockchain	Database
1.	Blockchain is decentralized because there is no admin or in-charge.	The database is centralized because it has admins and in-charge.
2.	Blockchain is permission less because anyone can access it.	The database required permission because it can be accessed only by entities who have rights to access.
3.	Blockchains are slow.	Databases are fast.
4.	It has a history of records and ownership of digital records.	It has no history of records and ownership of records.
5.	Blockchain is fully confidential.	The database is not fully confidential.
6.	Blockchain has only Insert operation.	The database has Create, Read, Update, and Delete operation.
7.	It is a fully robust technology.	It is not entirely robust technology.
8.	Disintermediation is allowed with blockchain.	Disintermediation is not allowed with the database.
9.	Anyone with the right proof of work can write on the blockchain.	Only entities entitled to read or write can do so.
10.	Blockchain is not recursive. Here, we cannot go back to repeat a task on any record.	The database is recursive. Here, we can go back to repeat a task on a particular record.

So, this brings us to the end of blog. This Tecklearn ‘Comparison between BlockChain and Database’ blog helps you with commonly asked questions if you are looking out for a job in BlockChain or Ethereum. If you wish to learn BlockChain or Ethereum and build a career in BlockChain domain, then check out our interactive, Blockchain and Ethereum Developer Training, that comes with 24*7 support to guide you throughout your learning period. Please find the link for course details:

https://www.tecklearn.com/course/blockchain-and-ethereum-certification-training/

Blockchain and Ethereum Developer Training

About the Course

Tecklearn’s Blockchain and Ethereum Certification Training course in the blockchain technology that covers essential concepts like Blockchain programming, Ethereum, Solidity, Digital ledger types, Smart Contracts, Multichain, Bitcoin mining, Cryptocurrency, etc. The course provides an overview of the structure and mechanism of Blockchain. You will learn about the Ethereum ecosystem, how smart contracts are developed using Solidity and how to deploy a business network using Hyperledger Compose.

Why Should you take BlockChain and Ethereum Certification Training?

• The average salary of a Blockchain Ethereum Developer is $158,860 per annum – Paysa.com.
• Blockchain tech has gone far beyond its beginnings in banking and cryptocurrency: In 2019, businesses are expected to spend $2.9B on the technology.
• IBM reports that Blockchain markets are headed to $60 Billion worldwide by 2024.

What you will Learn in this Course?

Introduction and origin of Blockchain

• How does our current financial system work?
• What can be the possible solution
• What is a distributed system
• What is Blockchain
• How does a Blockchain work
• Components of Blockchain
• Business network
• Consensus, Provenances, immutability and finality

Cryptocurrency and Blockchain

• Distributed system
• Distributed Ledger technology
• Global Payments
• Why BlockChain
• BlockChain and use case needs
• Requirements of blockchain for business
• BlockChain benefits
• Types of BlockChain
• Hands on

Bitcoin Platform

• What is Bitcoin?
• Why use Bitcoins?
• Bitcoin Ecosystem
• Structure of a Bitcoin Transaction
• Merkel Trees
• Scripting language in Bitcoin
• Applications of Bitcoin script
• Nodes in a Bitcoin Network
• Bitcoin Economics
• What is Bitcoin Mining?
• Types of Mining
• Mining and Consensus
• Hands On

Introduction to Ethereum

• What is Ethereum?
• Ethereum Layers
• Introducing Smart Contracts
• Cryptocurrency in Ethereum
• Mining in Ethereum
• Consensus Mechanism
• Platform Functions in Ethereum
• Technologies that support Ethereum
• Ethereum Programming Language
• Components for the development of Ethereum DApps
• Editors and tools
• Frontend Development
• Ethereum Test Networks
• ERC Tokens
• Hands On

Solidity

• Introducing Solidity
• Sample Code, Layout of Source File
• Structure of a Contract
• State Variables, Functions Types, Reference Types
• Special Variables and Functions, Expressions and Control Structures
• Function Calls, Error Handling
• Visibility for Functions and State Variables
• Inheritance, Constructors
• Importing Smart Contracts
• Gas Limit and Loops
• Sending and Receiving Ether
• Recommendations
• Contract ABI
• Setting up the development environment and Deploying DApp
• Hands On

Hyperledger

• Introduction to Hyperledger
• Hyperledger architecture
• Hyperledger Fabric V1 Architecture
• Consensus
• Hyperledger API
• Hyperledger Application Model
• Hyperledger project and tools
• Network Topology
• Exploring Hyperledger frameworks
• Business Network Deployment on Hyperledger Composer Playground
• Sample Transaction
• Service invoices
• Hands On

Hyperledger Composer

• Development Environment using Composer
• Developing business networks
• Testing business networks
• Introduction to Hyperledger Fabric
• Hyperledger Fabric Model
• Ways to create Hyperledger Fabric Blockchain Network
• Hands On

Create and Deploy Your Private Blockchain On Multichain

• What Is MultiChain
• MultiChain Privacy and Permissions
• Mining in MultiChain
• Multiple configurable Blockchains using MultiChain
• Setting up a Private Blockchain
• Hands On

Blockchain Use Cases

• Potential use cases in Blockchain
• BlockChain project

Got a question for us? Please mention it in the comments section and we will get back to you.

466