Blockchain database.
In database we use centralized storage of data but in blockchain we have decentralized storage of data.
In blockchain list of records are called as blocks they are linked using cryptography.
Blockchain ledger is more reliable and secured than the database. The information stored are identical accross its network. Each block contains information about previous block and they form a chain.
Blockchain databases are decentralized, permission less and no database administers.
Blockchain chain holds the history of records and ownership.
Blockchain database is not recursive we are not able to go back and change the records.
Some of the blockchain based databases are
BigchainDB, it is a document oriented database.
Cassandra, it is a key-value database.
ChainifyDB and CovenantSQL are relational database.
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