There are two types of records in a blockchain database.

Transactional Records
Block Records
Both the records can easily be accessed and can integrate with each other without following any complex algorithm.

In a blockchain database, the main type of record is a “block.” A block contains a list of transactions that have been validated and grouped together. Each block also includes a reference to the previous block, creating a chain of blocks, hence the term “blockchain.”

Within each block, you’ll find transaction records, which typically include information about the sender, receiver, amount, and a timestamp. Additionally, there may be other data, such as a cryptographic hash, to ensure the integrity of the block.

So, to answer your question, the primary record in a blockchain database is a “block,” and within each block, you have transaction records.