Interview Q&A / PostgreSQL
PostgreSQL interview questions
Indexes, EXPLAIN, transactions and isolation, JSONB and the Postgres specifics backend interviews probe.
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- Is there a performance difference between text and varchar(n) in PostgreSQL?
No. PostgreSQL stores text, varchar and varchar(n) the same way, and the length limit in varchar(n) is only a check. Use text unless a real business rule needs a maximum length.
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