Concurrent execution of transactions leaves the database in the same state as if they were executed sequentially.
Store data in JSON-like documents (e.g., MongoDB, CouchDB).
Opening a new DB connection for every request is expensive. Connection pools reuse existing connections, dramatically reducing latency and resource usage. Most web frameworks and ORMs support pooling. Concurrent execution of transactions leaves the database in
Popular Examples : PostgreSQL, MySQL, SQLite, Oracle Database, and Microsoft SQL Server. Non-Relational Databases (NoSQL)
The keyword "DB" appears in many other contexts. Here are a few you might encounter: Non-Relational Databases (NoSQL) The keyword "DB" appears in
Optimized for massive data volume queries spanning millions of columns. (e.g., Apache Cassandra, ScyllaDB).
Engineers use decibels to express gain, loss, and signal-to-noise ratios. Common variants include: Engineers use decibels to express gain
[ Transport Layer ] ---> [ Query Parser & Optimizer ] ---> [ Execution Engine ] ---> [ Storage Engine ] ---> [ Disk/Memory ]
Understanding these components helps you tune your DB for performance and reliability.
Splitting table columns across different locations to isolate frequently modified columns from static data. Caching Layers
Driven by the explosion of generative artificial intelligence and Large Language Models (LLMs), vector databases store data as high-dimensional mathematical representations called embeddings. They allow software to perform semantic similarity searches rather than exact keyword matching.