databases

PostgreSQL

PostgreSQL is one of the most widely used open-source relational databases. It is known for reliability, SQL standards support, extensibility, and strong transactional behavior.

sqldatabaserelational

Key Concepts

PostgreSQL is a relational database that stores structured data in tables.

SQL is used to query, insert, update, and manage data.

Transactions help keep data consistent and reliable.

Indexes improve query speed for common access patterns.

Common Interview Questions

What is PostgreSQL?

What is the difference between a relational database and NoSQL?

Why are indexes important in PostgreSQL?

Use Case

Store structured application data with SQL, transactions, and strong consistency.

Common Use Cases

Running production application databases.

Storing transactional business data.

Supporting APIs and backend systems with SQL queries.

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