Nosql

Optimizing MongoDB queries is essential for performance. Here’s how. Indexing Create Indexes // Single field index db.users.createIndex({ email: 1 }); // Compound index db.users.createIndex({ status: 1, createdAt: -1 }); // Text index db.posts.createIndex({ title: "text", content: "text" }); Explain Queries db.users.find({ email: "[email protected]" }).explain("executionStats"); Query Optimization Use Projection // Bad: Fetches all fields db.users.find({ status: "active" }); // Good: Only needed fields db.users.find( { status: "active" }, { name: 1, email: 1, _id: 0 } ); Limit Results db.users.find({ status: "active" }) .limit(10) .sort({ createdAt: -1 }); Best Practices Create appropriate indexes Use projection Limit result sets Avoid $regex without index Monitor slow queries Conclusion Optimize MongoDB for better performance! 🍃

Elasticsearch is powerful for search. Here’s how to get started. Basic Operations Create Index await client.indices.create({ index: 'users', body: { mappings: { properties: { name: { type: 'text' }, email: { type: 'keyword' }, age: { type: 'integer' } } } } }); Index Document await client.index({ index: 'users', id: '1', body: { name: 'John Doe', email: '[email protected]', age: 30 } }); Search const result = await client.search({ index: 'users', body: { query: { match: { name: 'John' } } } }); Best Practices Design mappings carefully Use appropriate analyzers Optimize queries Monitor cluster health Backup regularly Conclusion Master Elasticsearch for powerful search! 🔍