Ποια είναι η εμπειρία σας με βάσεις δεδομένων SQL και NoSQL;

I have experience working with relational databases such as PostgreSQL and MySQL. I have handled their deployment, backup, recovery, performance monitoring, and query optimization. I have also worked on data migration.

-- Example of a simple query in PostgreSQL
SELECT id, name, status
FROM users
WHERE status = 'active';

I also have experience with NoSQL solutions, particularly MongoDB and Redis. In MongoDB, I participated in setting up replication, sharding, and indexing. Redis was used for caching and session management.

// Example query to MongoDB (using mongo shell)
db.products.find({ category: "electronics" });

My experience includes automating database administration using scripts (Bash, Python) and configuration management tools (Ansible).

Database	Type	Key tasks
PostgreSQL	SQL	Deployment, backup, monitoring
MySQL	SQL	Optimization, migration
MongoDB	NoSQL	Replication, sharding, indexing
Redis	NoSQL	Caching, session management

I understand the fundamental differences between SQL and NoSQL databases and can choose the appropriate solution based on application requirements.