Interview Q&A / PostgreSQL
PostgreSQL interview questions
Indexes, EXPLAIN, transactions and isolation, JSONB and the Postgres specifics backend interviews probe.
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- How does FOR UPDATE SKIP LOCKED help build a job queue in PostgreSQL?
SKIP LOCKED makes a query ignore rows another transaction has already locked instead of waiting. Several workers can each grab different pending jobs at the same time without blocking or double-processing.
IntermediateQuick answer1 min read