Incremental sort exploits presorted data to avoid expensive full sorts, but cost estimation errors on skewed data can backfire.

Diagnose spilling hash joins with `enable_hashjoin = off`.

PostgreSQL 13 made hash aggregation memory-safe by allowing it to spill to disk — but that safety introduced a surprise regression for some queries on upgrade.

Learn relational algebra by building expressions that compile to real SQL.

Disable `enable_gathermerge` to diagnose whether a slow parallel query's bottleneck is the leader-side merge step or something deeper—like worker memory…

Enforce constraints on every assignment, not just at construction.

Reorder GROUP BY and DISTINCT keys to cut comparison costs and skip sorts—new optimizations in PostgreSQL 17 and 18 that usually stay invisible but…

Cygnet is a PostgreSQL ORM for async Python that refuses to hide the SQL.

Diagnose index scan performance problems by temporarily disabling index scans or bitmap scans and measuring what the planner chooses instead.

Quarantine user uploads before they reach your system.