Databases

Databases

Articles

SQL, NoSQL, PostgreSQL, MySQL, and data management guides.

Learning Path — 29 articles

1 ACID Transactions in Databases: A Complete Guide Learn ACID transactions — Atomicity, Consistency, Isolation, Durability. Understand transaction isolation levels and … 9 min Start Here 2 Database Indexing Explained: How Indexes Speed Up Queries Learn how database indexes work, when to use them, and common index types. Practical guide with PostgreSQL examples. 9 min Start Here 3 Database Normalization Explained Simply Learn database normalization from 1NF to 3NF with clear examples. Understand when to normalize and when denormalization … 7 min Start Here 4 SQL Cheat Sheet: The Most Common Commands A quick-reference SQL cheat sheet covering SELECT, INSERT, UPDATE, DELETE, JOINs, aggregate functions, filtering, and … 9 min 5 Best Databases in 2026: PostgreSQL, MongoDB, Redis, and More Compared Compare the best databases for 2026. PostgreSQL, MySQL, MongoDB, Redis, and alternatives ranked by performance, … 10 min 6 SQL Subqueries: A Complete Guide with Examples Learn SQL subqueries — SELECT, FROM, and WHERE subqueries, correlated subqueries, EXISTS, and performance tips with … 8 min 7 MongoDB: A Beginner's Guide to NoSQL Databases Learn MongoDB from scratch. Covers document model, CRUD operations, indexing, aggregation pipeline, and when to choose … 7 min 8 Redis: A Beginner's Guide to Caching and NoSQL Learn Redis — data types, caching strategies, persistence, pub/sub, and using Redis for high-performance data storage. 7 min 9 SQL Query Optimization: Write Faster Queries Learn SQL query optimization — EXPLAIN, indexing strategies, query rewriting, avoiding N+1, and database performance … 8 min 10 Database Backup and Recovery: Strategies for Data Safety Learn database backup strategies — full, incremental, and differential backups, point-in-time recovery, replication, and … 7 min 11 NoSQL Databases: MongoDB, Cassandra, and Redis Explore NoSQL databases — document stores, key-value stores, column-family databases, graph databases, and when to use … 7 min 12 Database Transactions: ACID, Isolation Levels, and Locks Transaction management and concurrency control — ACID properties, isolation levels, locking mechanisms, and MVCC. 8 min 13 SQL JOINs Explained — Inner, Left, Right, Full Outer SQL JOINs Explained — Inner, Left, Right, Full Outer. Everything you need to get started with sql joins explained, … 8 min 14 SQL Performance Tuning: Indexes, Queries, and Optimization Slow queries, EXPLAIN plans, indexing strategies, and query optimization techniques for database performance. 8 min 15 Database Replication: Master-Slave, Multi-Master, and Streaming Replication strategies — synchronous vs asynchronous, master-slave, multi-master, and streaming replication. 7 min 16 PostgreSQL vs MySQL — Which Database to Choose A practical comparison of PostgreSQL and MySQL — performance, features, ACID compliance, syntax differences, and which … 8 min 17 Graph Databases: Neo4j and Cypher Query Language Graph data models, relationships, traversal — working with Neo4j and the Cypher query language. 7 min 18 Database Sharding Guide — Horizontal Scaling Strategy Database Sharding Guide — Horizontal Scaling Strategy. A straightforward look at database sharding, covering what … 8 min 19 Vector Databases Guide — Embeddings, Search, and RAG Vector Databases Guide — Embeddings, Search, and RAG. Everything you need to get started with vector databases, … 8 min 20 Database Advanced Techniques Database Advanced Techniques. Learn what you need to know about database advanced techniques: core concepts, methods, … 8 min 21 Database Intermediate Skills Database Intermediate Skills. An accessible introduction to database intermediate skills, exploring key ideas and … 8 min 22 Database Industry Insights Database Industry Insights. Everything you need to get started with database industry insights, explained clearly and … 8 min 23 Database Professional Growth Database Professional Growth. Discover the principles and practices of database professional growth in this … 8 min 24 Database Project Ideas Database Project Ideas. Build your understanding of database project ideas with clear explanations and practical … 8 min 25 Database Learning Pathways Database Learning Pathways. A straightforward look at database learning pathways, covering what matters most for … 8 min 26 Database Resource Collection Database Resource Collection. A practical guide to database resource collection, covering key concepts, techniques, and … 8 min 27 Database Portfolio Development Database Portfolio Development. Understand the essentials of database portfolio development — from foundational ideas to … 8 min Advanced 28 Database Expert Interviews Database Expert Interviews. Learn what you need to know about database expert interviews: core concepts, methods, and … 8 min Advanced 29 Database Innovation Trends Database Innovation Trends. An accessible introduction to database innovation trends, exploring key ideas and practical … 8 min Advanced