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1. Beginner Course

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  1. 1. What are these cryptocurrencies?
  2. 2. Bitcoin - the story of a technological revolution
  3. 3. Satoshi Nakamoto, who is the creator of Bitcoin?
  4. 4. Vitaly Buterin – the creator of Ethereum
  5. 5. What is blockchain, and how does it work?
  6. 6. What is an NFT token?
  7. 7. What is money?
  8. 8. Cryptocurrencies vs fiat money, which will win?
  9. 9. What is DeFi (Decentralized Finance)?
  10. 10. DeFi: opportunities, advantages and disadvantages of decentralized finance
  11. 11. What is an altcoin?
  12. 12. Stablecoins - What are they?
  13. 13. Cryptocurrency wallet - what is it?
  14. 14. Why do we talk about bull and bear markets?
  15. 15. Security in the crypto market - what rules are worth following?
  16. 16. What is the seed phrase in cryptocurrencies?
  17. 17. Dogecoin and memecoin - what are they?
  18. 18. What is a Ponzi scheme?
  19. 19. What is a Soft and Hard Fork?
  20. 20. Blockchain - examples of use
  21. 21. Is blockchain safe?
  22. 22. What are the types of blockchain networks?
  23. 23. What is blockchain network congestion, and how does it work?
  24. 24. Cryptocurrency wallets: Hot Wallet vs. Cold Wallet - key differences!
  25. 25. Cryptocurrency wallet diversification
  26. 26. Halving Bitcoin - what is it, and how does it affect the price?
  27. 27. Blockchain versus databases: key differences!
  28. 28. How do you transfer cryptocurrencies?
  29. 29. The most important cryptocurrency acronyms/slang you need to know!
  30. 30. The memecoin story: madness or great investment?
  31. 31. What is Ethereum? 
  32. 32. Everything you need to know about gas fees in Ethereum!
  33. 33. Gavin Wood: Blockchain Visionary and Co-Founder of Ethereum
  34. 34. Decentralized Apps – what are they?
  35. 35. What is Proof of Work (PoW) and what is Proof of Stake (PoS)?
  36. 36. What is the Proof of Authority (PoA) consensus mechanism?
  37. 37. What is Proof of Burn (PoB)?
  38. 38. What is a whitepaper? What is its purpose, and how do you write it?
  39. 39. Smart Contracts - what are they?
  40. 40. Know your customer (KYC) and Anti-money laundering (AML) what are they in the cryptocurrency industry?
  41. 41. Blockchain and NFT games - how to make money on them?
  42. 42. Liquidity in the cryptocurrency market
  43. 43. Inflation and its effects on financial markets
  44. 44. What is stagflation and why does it have a negative impact on the market?
  45. 45. What are utility tokens and what use do they have in the cryptocurrency sector?
  46. 46. What is cryptocurrency mining?
  47. 47. What is the mining difficulty?
  48. 48. What is compound interest, and how does it work?
  49. 49. What Are Privacy Coins and Are They Legal?
  50. 50. What is CBDC - central bank digital money?
  51. 51. What is Cryptocurrency Airdrop all about?
  52. 52. Key differences between ICO, IEO and STO
  53. 53. What are decentralized DAO organizations, and how do they work? What are DAO tokens?
  54. 54. What is EURT? How does it work?
  55. 55. What is the difference between Circulating Supply and Total Supply?
  56. 56. Snapshot from the world of cryptocurrencies - what is it?
  57. 57. What is the Fear and Greed index for cryptocurrencies?
  58. 58. APR versus APY: what is the difference?
  59. 59. What is an Initial Farming Offer (IFO)?
  60. 60. What is Regenerative Finance (ReFi)?
  61. 61. Who Is Craig Wright, the Alleged Creator of Bitcoin?
  62. 62. What Is Bitcoin (BTC.D) Dominance?
  63. 63. Michael Saylor, Self-Proclaimed Bitcoin Maximalist
  64. 64. Bitcoin Pizza Day
  65. 65. AI blockchain - a new look into the future?
  66. 66. What is WorldCoin? Everything you need to know about this cryptocurrency!
  67. 67. Azuki NFT collection guide: everything you need to know about it!
  68. 68. The 10 most expensive non-fungible tokens (NFTs) ever!
  69. 69. The Bored Ape Yacht Club (BAYC) - the story of the popular NFT collection!
  70. 70. CyberPunks - the story of the most popular NFT collection in the crypto industry!
  71. 71. NFT Art: The digital art revolution - history and examples!
  72. 72. Who is Changpeng Zhao, CEO of Binance?
  73. 73. Who is Brian Armstrong - CEO of Coinbase?
  74. 74. Who is Galy Gensler and the SEC? How does the Securities and Exchange Commission (SEC) affect the cryptocurrency market?
  75. 75. Web3's most popular social media platforms! Will they replace the platforms we know?
  76. 76. What is IoT - the Internet of Things?
  77. 77. On-chain analysis in the cryptocurrency world: Everything you need to know about It
  78. 78. Can you pass on your cryptocurrencies after death? How do you pass on a cryptocurrency inheritance?
  79. 79. What is the Howey test? What application does it have in cryptocurrencies?
  80. 80. The use of blockchain technology in the world of sport
Lesson 27 of 80
In Progress

27. Blockchain versus databases: key differences!

Blockchain and regular databases are two different approaches to storing and managing information. Both have their place in today’s world of technology, but there are a few key differences between the two. In today’s lesson, we will look at these differences to further understand what makes blockchain different from basic databases.

Blockchain and databases – summary definitions

Before going into the details, let’s look at the basic definitions of both terms.

Blockchain is a distributed and unalterable registry that stores transactions and data in blocks linked in a chain. Each block contains a set of transactions and is securely linked to the previous and next block. The Blockchain uses an algorithm consensus to confirm and validate transactions, and data once entered the blockchain cannot be changed.

A database is a data storage and management system that runs on a single computer or server. Data in a database is stored in tables and can be easily modified or deleted by authorised users.

Blockchain technology vs. traditional databases

Their main difference is mainly centralisation. In databases, every record is centralised. With blockchain, it is each participant in the network that has a copy of all records (data) and literally all changes. In this way, every participant has access to them and can see the origin of this data. The blockchain technology is unique in that in its case, it will immediately identify all unreliable information.

Another difference will be the historical record. In the case of databases, they only record current information. They do not record the data that has registered before. As you know, in the case of blockchain technology the case is completely different. Blockchain not only stores information that is recorded in real time, but also allows us to see its history. In practice, blockchains can create these databases that have their own history.

Another important aspect that distinguishes blockchain from databases is performance. Unfortunately, blockchains, despite their many advantages, are less efficient than classic databases. Surely, with the development and widespread adoption of blockchain technology, their performance will improve, but we will probably have to wait for that.

A final key issue is confidentiality. Here, too, databases trump blockchain. It is the centralised databases that can be fully controlled in terms of writing and reading. Blockchain unfortunately does not. When you think deeper, that’s basically what it was created for, too. However, if confidentiality is your goal, consider using a traditional database in this case.

What else do you need to know about blockchain technology and databases?

The above paragraph is the basic differences that exist between blockchain and databases. However, it is worth noting at this point that any blockchain can be considered a database, but vice versa is not.

Databases at the very beginning were designed to store simple, digital information. With their widespread adoption, they began to use a relational model, which enabled ways to store more complex information and data. Databases can be modified, managed, updated and above all – controlled by administrators. So we are dealing with central control. The administrator has the power to create, modify and even delete any records in the database. What is more, they are also in charge of optimising the databases and their size.

In the case of blockchain, we have no, central control. Once added to a block, the information is permanent – it cannot be removed. No one controls the information that is put into the bases on the blockchain. All participants in a given network have influence over it and are responsible for how the base is maintained and updated. Thanks to this ability to store data securely, transparently and tamper-proof, databases built on blockchain are gaining popularity. Let’s remember that blockchain technology is not just for cryptocurrencies, but for managing banking, real estate, supply chain or much, much more.


Blockchain and regular databases are two different tools that are used in different areas. Blockchain is distinguished by its distributed nature, immutability of data and applications such as cryptocurrencies.

Ordinary databases are more flexible and suitable for traditional applications such as corporate data management. The choice between the two depends on the specific use case and the needs of the organisation.

Complete today’s lesson!

  1. What is blockchain, and how does it work?
  2. Examples of the use of blockchain technology.
  3. Is blockchain secure?