Database

A playground that runs PHP across versions with MySQL, PostgreSQL or SQLite attached. in Programming Languages →

An ORM mapping Java objects to relational database rows. in Java & JVM →

A resource list for Prisma, the ORM turning a database into a type-safe client. in Backend, API & System Design →

A backend platform folding the database, server functions and real-time subscriptions into one product. in Backend, API & System Design →

A list of tools that make working with databases easier (clients, migration, schema). in Databases →

A list of libraries and tools for MongoDB, the document-based NoSQL database. in Databases →

A list of extensions, tools and resources for PostgreSQL. in Databases →

An open-source SQL editor and manager supporting many databases. in Databases →

A distributed SQL database that scales horizontally with strong consistency and survivability, speaking the PostgreSQL protocol. in Databases →

A reference giving the correct connection-string format for every database and driver. in Databases →

Queries a document store with a SQL-like language (N1QL), which is a gentler break for teams arriving from the… in Databases →

A tool that turns a simple text DSL (DBML) into shareable ER diagrams fast. in Databases →

A universal desktop database client managing many databases from one interface. in Databases →

A full course on normal forms and schema design. in Databases →

A community-driven open-source fork of MySQL, usable as a drop-in replacement. in Databases →

Markus Winand’s site teaching modern SQL features such as window functions across dialects. in Databases →

Document-oriented NoSQL database that stores data in flexible JSON-like (BSON) documents rather than rigid relational… in Databases →

MongoDB’s official free courses. Unlike third-party courses it puts weight on data modelling — designing a document… in Databases →

Works MySQL end to end over a sample database, treating join types, subqueries and stored procedures separately. in Databases →

Serverless Postgres with branching and scale-to-zero; it joined Databricks in 2025. in Databases →

A free desktop client for Oracle databases combining querying, schema browsing and PL/SQL debugging. in Databases →

Serverless MySQL built on Vitess, managing schema changes through branches with no downtime. in Databases →

A backend shipping as one Go file, providing SQLite, auth and a real-time API. in Databases →

Practise SQL with graded PostgreSQL exercises in the browser. in Databases →

A PostgreSQL tutorial showing each topic with a runnable query. in Databases →

Searchable documentation for every postgresql.conf parameter, with version differences, defaults and community recommendations. in Databases →

Redis’s official GUI — browse, edit, query and profile your data. in Databases →

An interactive online book that teaches SQL through exercises run in the browser against one real dataset. in Databases →

SQL from basics to advanced in four hours for anyone who wants the whole picture in one sitting. in Databases →

Interactive SQL lessons that teach by doing in the browser; each lesson ends with an exercise where you write the query. in Databases →

A serverless embedded database living in a single file — the most widely deployed database engine in the world. in Databases →

An exercise set that teaches SQL by making you write queries in the browser, each section over its own dataset. in Databases →

An open-source Firebase alternative adding auth, APIs and storage on top of Postgres. in Databases →

A multi-model database combining document, graph and relational in one engine. in Databases →

A database platform built on libSQL, a SQLite fork, that replicates the database to edge nodes near the user. in Databases →

Markus Winand’s developer-focused guide to SQL indexing and performance. in Databases →

An online practice that builds SQL proficiency with challenging problems. in Testing & QA →

The vector index sits beside your documents. in AI · RAG, Embeddings & Vectors →

Relationships are first-class data, not foreign keys. in AI · RAG, Embeddings & Vectors →

An extension adding a vector type plus HNSW and IVFFlat indexes to PostgreSQL. in AI · RAG, Embeddings & Vectors →

With JSONB, full-text search and pgvector it now does the work of three separate systems. in AI · RAG, Embeddings & Vectors →

An in-memory data structure store, used on the AI side for session state, rate-limit counters and response caching. in AI · RAG, Embeddings & Vectors →

An open table format for large analytical tables, giving schema evolution, time travel and atomic writes. in Data Engineering →

A columnar OLAP database for analytics, extremely fast at aggregations at scale. in Data Engineering →

A tool managing data-warehouse transformations with SQL + version control + tests. in Data Engineering →

An open storage layer bringing ACID transactions and time travel to data lakes. in Data Engineering →

An in-process analytical database — no server, it queries files directly. in Data Engineering →

The LiteSpeed web server’s configuration reference, including how LSCache rules are written. in DevOps & Infrastructure →

The reference for its data structures — lists, sets, sorted sets, streams. in DevOps & Infrastructure →

A step-by-step tutorial that builds a SQLite-like database from scratch in C: REPL, B-tree, pager, cursors. in Learning & Roadmaps →

SQL and data science interview questions with real queries run and checked in the browser. in Practice & Challenges →

A tool generating realistic fake test data to a given schema (CSV, JSON, SQL). in Converters, Formatters & Checkers →