Interview Q&A / PostgreSQL
PostgreSQL interview questions
Indexes, EXPLAIN, transactions and isolation, JSONB and the Postgres specifics backend interviews probe.
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- What is a partial index in PostgreSQL and when is it useful?
A partial index has a WHERE clause and indexes only the rows that match it. It is smaller and faster to maintain, and ideal when queries target a small, well-defined slice such as unprocessed jobs or active users.
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