databases

Master MongoDB and PostgreSQL for schema design, queries, indexing, and administration.

• Work with MongoDB (document) and PostgreSQL (relational) databases
• Design schemas and write queries in SQL or MongoDB syntax
• Manage users, permissions, backups, and performance
• Implement migrations, replication, and sharding

• Flexible schema in MongoDB for evolving data
• Strict schema and ACID transactions in PostgreSQL
• Support for JSON/JSONB, full-text, and geospatial queries
• Both support replication, indexing, and high availability
• Cloud integration via MongoDB Atlas
• Performance optimization through indexing and query analysis

1. 1.Choose database based on data model and scalability needs
2. 2.Write queries using SQL (PostgreSQL) or MongoDB query language
3. 3.Optimize indexes and monitor query performance
4. 4.Set up replication, backups, and user permissions
5. 5.Use migration and backup scripts for automation