Tutorials PostgreSQL Tutorial

Backup & Recovery — Complete Guide

Backup & Recovery — Complete Guide: free step-by-step lesson with examples, common mistakes, and interview tips — part of PostgreSQL Tutorial on Toolliyo Academy.

8 min read Updated 8/22/2026

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PostgreSQL Tutorial · Lesson 68 of 100

Backup & Recovery

SQL ✓ → Advanced

Advanced · 2 — Production · ~10 min · PostgreSQL — Replication & High Availability

What is this?

Backup strategies include pg_dump logical dumps, pg_basebackup physical base backups, and filesystem snapshots — plus WAL archiving for point-in-time recovery.

Why should you care?

PostgresVerse operator drops wrong table — need restore path beyond replication lag window.

See it live — copy this example

Run in pgAdmin or psql.

pg_dump -Fc -d PostgresVerse -f postgresverse_$(date +%F).dump

-- restore test to new database
createdb PostgresVerse_restore
pg_restore -d PostgresVerse_restore postgresverse_2026-07-19.dump

What happened?

-Fc is custom compressed format.
pg_dump logical backup portable across versions.
pg_restore into new DB validates backup without overwriting prod.

Practice next

Run pg_dump from shell against PostgresVerse.
List dump file size and store offsite.
Restore to PostgresVerse_restore on laptop.
pg_dump -t orders only for partial backup.
pg_basebackup -D standby_data -Fp -Xs -P for replica bootstrap.

Remember

pg_dump for logical; basebackup for physical replica seed. Store backups offsite encrypted. Test restore quarterly.

PostgresVerse nightly dump

Cron pg_dump to S3; weekly auto-restore job to scratch instance.

Outcome: Bad migration caught when restore test fails Friday.

Interview prep for this lesson

Practice these questions aloud after reading—each links to a full structured answer.

Junior Detailed

Explain SQL queries in the context of PostgreSQL.

Short answer: Interviewers want a crisp definition, a practical example from your projects, and awareness of trade-offs—not textbook dumps. Explain a bit more How to structure your answer (60–90 seconds) Define SQL queri…

What are common mistakes teams make with Schema design when using PostgreSQL?

Short answer: Interviewers want a crisp definition, a practical example from your projects, and awareness of trade-offs—not textbook dumps. Explain a bit more How to structure your answer (60–90 seconds) Define Schema de…

Senior Detailed

How would you debug a production issue related to Transactions in a PostgreSQL application?

Short answer: Interviewers want a crisp definition, a practical example from your projects, and awareness of trade-offs—not textbook dumps. Explain a bit more How to structure your answer (60–90 seconds) Define Transacti…

Compare two approaches to Indexing—when would you choose each?

Short answer: Interviewers want a crisp definition, a practical example from your projects, and awareness of trade-offs—not textbook dumps. Explain a bit more How to structure your answer (60–90 seconds) Define Indexing…

Junior Detailed

Describe a real-world scenario where Normalization mattered in a PostgreSQL project.

Short answer: Interviewers want a crisp definition, a practical example from your projects, and awareness of trade-offs—not textbook dumps. Explain a bit more How to structure your answer (60–90 seconds) Define Normaliza…

All course Q&A Practice exams

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