Database terms

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🗄️ Where your data lives, breathes, and occasionally panics

Almost every application is, at its core, a system for reading and writing data. This category covers relational and non-relational databases, query optimisation, indexing strategies, transactions, normalisation, replication, and the CAP theorem trade-offs that dictate how distributed data behaves. Choosing and using the right database correctly is one of the highest-leverage skills in backend development.

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InnoDB vs MyISAM

InnoDB is the default MySQL storage engine supporting transactions, foreign keys, and row-level locking — MyISAM is legacy with table-level locking and no transaction support.

1mo ago database beginner

INSERT ... ON DUPLICATE KEY UPDATE PHP 5.1+

An atomic MySQL upsert — inserts a new row or updates the existing one if a unique key constraint would be violated.

1mo ago database intermediate