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Articles tagged with #databases
TL;DR: The N+1 query problem occurs when an ORM executes one initial database query followed by N subsequent queries to fetch related child data. I solve this by using SQL joins, batch fetching (IN qu
Quick Answer: Databases don't just dump raw rows onto a disk sequentially. Instead, they chunk data into blocks called "pages" (typically 8KB). To prevent massive performance bottlenecks when row size
Quick Answer: When you insert data into a database, it doesn't immediately write to the main data table on disk. Instead, it caches the data in a RAM-based buffer pool and writes to an append-only Wri
Quick Answer: Database transaction isolation levels control the trade-off between concurrency (speed) and data consistency (safety) when multiple queries run simultaneously. The four standard levels a
