Question 1

How to install PostgreSQL on Linux?

Accepted Answer

Use your package manager, e.g., 'sudo apt install postgresql' on Ubuntu. For source builds or detailed steps, refer to the official installation guide linked in the README, which covers various platforms.

Question 2

PostgreSQL vs MySQL: which is better?

Accepted Answer

PostgreSQL excels in advanced SQL features, extensibility, and standards compliance, while MySQL is often preferred for simpler, read-heavy workloads. The choice depends on your need for complex data handling versus raw speed.

Question 3

How to backup a PostgreSQL database?

Accepted Answer

Use pg_dump for logical backups or set up continuous archiving for physical backups. The documentation provides comprehensive guides, including point-in-time recovery and replication for high availability.

Question 4

Does PostgreSQL support JSON data?

Accepted Answer

Yes, it includes JSON and JSONB data types with indexing support via GIN indexes, but for heavy document storage or dynamic schemas, specialized NoSQL databases might offer better performance out-of-the-box.

Question 5

How to optimize slow queries in PostgreSQL?

Accepted Answer

Use EXPLAIN ANALYZE to profile queries, create appropriate indexes like B-tree or GIN, and tune configuration parameters such as work_mem. The docs offer best practices for query planning and performance tuning.

Question 6

What is PostGIS and how do I use it?

Accepted Answer

PostGIS is a spatial database extender for PostgreSQL that adds geographic object support. Install it as an extension, and it enables location-based queries, making it ideal for GIS applications, with detailed usage in the PostGIS documentation.

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