Databases articles.

SQL and NoSQL solve different data problems. Here's how to pick the right one instead of defaulting to whichever is trendier.

PostgreSQL has quietly become the default choice for serious backend work. Here's what makes it different from other databases.

A slow query is often a missing index, not a slow database. Here's how indexing actually works and when it can hurt you.

Normalization keeps your data consistent and avoids duplication. But strict normalization isn't always the right call. Here's why.

Redis is often called "just a cache," but that undersells it. Here's what it actually does and where it genuinely helps.

MongoDB and PostgreSQL represent two different philosophies about data. Here's how to actually decide between them for a real app.