Awesome GitHub RepositoriesSQL Aggregate Functions

SQLite.swift is a type-safe Swift wrapper and object-relational mapping layer that provides a bridge for interacting with SQLite databases. It functions as a database driver that allows for embedded database management and local data persistence within Swift applications. The project distinguishes itself through a type-safe expression builder that verifies SQL statement syntax and intent at compile time. It includes specialized support for high-performance text matching via full-text search integration and provides mechanisms for securing sensitive data through database encryption. The libra

TextQL is a command line SQL query engine designed to execute relational queries directly against structured text files, such as CSV and TSV, without requiring a database import. It functions as a relational text file analyzer and a CSV processor that treats plain text files as virtual tables for filtering, joining, and aggregating data. The tool is built as a pipe-compatible data transformation utility, allowing it to process data from standard input and output formatted datasets. It enables relational joins across multiple files or directories within a single query to analyze relationships

This project is a Go language driver for the SQLite database. It provides a relational database interface and a Cgo wrapper that connects Go applications to SQLite for persistent local data storage and query execution. The implementation serves as a provider for JSON document storage and local full-text search. It enables the creation, querying, and modification of JSON data and the implementation of searchable indexes for large text datasets directly within the database. The driver supports standard SQL query execution for both file-based and in-memory storage. It includes capabilities for

GRDB.swift is a comprehensive SQLite toolkit and object-relational mapper for Swift. It provides a database wrapper that handles local data persistence, connection management, and encrypted file storage for Apple platforms. The library features a dedicated observation framework that tracks database changes to automatically synchronize the application state and user interface in real time. It distinguishes itself with a type-safe query builder and a protocol-based mapping system that converts database rows into structured Swift objects. The toolkit covers a broad range of administrative and o

AlaSQL is a JavaScript SQL database engine that allows for the filtering, grouping, and joining of in-memory object arrays and JSON data. It functions as an in-memory SQL database and client-side data processor, enabling the execution of SQL statements against JavaScript arrays and external data sources in both browser and server environments. The project serves as a universal data query tool capable of performing relational joins across diverse sources, such as merging Google Spreadsheets, SQLite files, and remote APIs into a single result set. It also acts as an IndexedDB SQL wrapper, allow

ToyDB is a distributed SQL database that provides a system for storing and querying data across multiple nodes. It focuses on maintaining strong consistency and fault tolerance through the implementation of a distributed consensus algorithm. The project distinguishes itself by supporting historical data versioning, enabling time-travel queries to retrieve the state of the database from a specific point in the past. It utilizes multi-version concurrency control to manage ACID transactions and ensure data integrity during concurrent operations. The system covers relational data modeling with t

SQLiteStudio is an open-source graphical tool for browsing, editing, and managing SQLite database files. It combines a full-featured SQL editor with syntax highlighting, a visual database schema designer for creating entity-relationship diagrams, and a plugin-based extensibility platform that allows adding custom functionality through C/C++, JavaScript, Tcl, or Python. The application distinguishes itself through its multi-language scripting engine, which embeds JavaScript, Tcl, and Python interpreters to enable user-defined functions and scripts within SQL queries. It supports encrypted data

Pinot is a distributed, columnar analytical database designed for high-concurrency, low-latency query processing. It functions as a real-time OLAP datastore, enabling interactive, user-facing analytics by ingesting and querying massive datasets from both streaming and batch sources. The system architecture relies on a centralized controller for cluster coordination and a distributed segment-based storage model to ensure horizontal scalability. The platform distinguishes itself through a hybrid ingestion pipeline that unifies real-time event streams and historical batch data into a single quer

Apache Hive is a SQL-on-Hadoop data warehouse that enables querying and managing petabytes of data stored in distributed storage such as HDFS and cloud storage services. It provides a familiar SQL interface for batch analytics and reporting, supported by a core set of components including the HiveServer2 Thrift service for remote query execution, the Hive Metastore Service for central metadata management, the Hive ACID Transaction Engine for concurrent read-write operations, and the Hive LLAP Interactive Engine for low-latency analytical processing. The WebHCat REST API offers an HTTP interfac

GreptimeDB is a distributed, open-source time-series database built for unified observability. It stores and queries metrics, logs, and traces together in a single columnar engine, supporting both SQL and PromQL for analysis. The database is designed as a Kubernetes-native operator with a decoupled compute and storage architecture, enabling horizontal scaling and multi-region deployment. What distinguishes GreptimeDB is its role as a multi-protocol ingestion gateway, accepting data through OpenTelemetry, Prometheus Remote Write, InfluxDB, Loki, Elasticsearch, Kafka, and MQTT protocols without

Perfetto is a platform for system-level performance tracing and analysis on Linux and Android. It combines a high-throughput trace recorder, a SQL-based query engine, and a browser-based visualizer into a single toolchain. The platform covers CPU scheduling and call-stack profiling, native and Java heap memory allocation tracking, GPU and graphics events, and system-wide counters such as CPU frequency and power consumption. The architecture decouples trace recording from offline analysis, using a compact protobuf format for event encoding and columnar storage for efficient SQL queries. The we

Este proyecto es una hoja de trucos de bases de datos relacionales y una guía de referencia de SQL. Proporciona una colección de ejemplos de sintaxis y documentación de consultas para gestionar bases de datos relacionales utilizando lenguaje de consulta estructurado. La herramienta está implementada como un sitio estático con documentación buscable en el lado del cliente, lo que permite el filtrado inmediato de contenido técnico a través de un índice basado en navegador. La referencia cubre la gestión de bases de datos relacionales, incluyendo la recuperación de datos, la gestión de esquemas de bases de datos y el mantenimiento de registros. También incluye orientación sobre la manipulación de datos relacionales mediante uniones de tablas (joins) y la generación de informes agregados.

Readyset is a transparent caching proxy for PostgreSQL and MySQL that sits between an application and its database, intercepting SQL queries and serving cached results from memory. It automatically caches query results on first execution and keeps those caches consistent by consuming the database’s replication stream in real time, enabling faster repeated reads without application code changes. The proxy also supports caching advanced SQL functions such as window functions, bucket functions, and locale-aware collation sorting, and exposes an interface that allows AI agents to inspect proxied q

Arroyo is a high-performance stream processing platform built in Rust. It executes continuous SQL queries on streaming data with event-time semantics, enabling accurate windowed aggregations, joins, and stateful computations on unbounded event streams. The platform uses native Rust execution for high throughput and low latency, with periodic checkpointing for exactly-once fault tolerance and horizontal scaling across distributed workers. The system integrates deeply with Kafka for reading and writing topics with exactly-once delivery and supports change data capture (CDC) from MySQL and Postg

H2 es un sistema de gestión de bases de datos relacionales compatible con JDBC, escrito en Java. Funciona como una base de datos SQL embebible que puede ejecutarse directamente dentro de un proceso de aplicación para eliminar la latencia de red, o como una base de datos en memoria para almacenamiento volátil de alto rendimiento. También incluye una consola basada en web para ejecutar comandos SQL y administrar esquemas. El sistema se caracteriza por sus modos de despliegue flexibles, incluyendo un modo servidor independiente para acceso remoto TCP/IP y un modo mixto para conectividad local y remota simultánea. Cuenta con una capa de emulación de dialectos y modos de compatibilidad que permiten imitar el comportamiento y la sintaxis de otros sistemas de bases de datos. El motor proporciona un amplio conjunto de capacidades que cubren transacciones ACID con control de concurrencia multiversión, soporte para datos geoespaciales y JSON, y funciones avanzadas de ventana analítica. Incluye herramientas para la preservación de datos mediante copias de seguridad comprimidas, restauración de scripts SQL y gestión de memoria fuera del heap (off-heap) para manejar grandes datasets. La base de datos se integra con aplicaciones utilizando controladores estándar de Java Database Connectivity y URLs de conexión.

sqlean es una colección de librerías de extensión para SQLite implementadas como librerías compartidas basadas en C. Proporciona un conjunto de funciones escalares y de tabla adicionales que amplían las capacidades nativas del motor de base de datos SQLite. El proyecto proporciona conjuntos de herramientas especializados para criptografía, matemáticas avanzadas, redes y acceso al sistema de archivos. Estos incluyen hashing y codificación binaria, análisis estadístico, validación de direcciones IP y la capacidad de mapear archivos CSV o rutas del sistema de archivos como tablas virtuales. La librería también incluye herramientas integrales de procesamiento de texto como expresiones regulares, coincidencia difusa (fuzzy matching) y manipulación de cadenas consciente de Unicode. Las capacidades adicionales cubren la gestión de fecha y hora de alta precisión y la generación de identificadores únicos.

Velox es un motor de ejecución de consultas en C++ de alto rendimiento y biblioteca de procesamiento de datos columnares. Sirve como un framework componible para implementar motores de consulta analíticos, proporcionando un evaluador de expresiones vectorizadas y un toolkit para sistemas de gestión de datos. El proyecto se distingue por su uso de ejecución columnar vectorizada y asignación de memoria basada en arena para procesar conjuntos de datos a gran escala. Cuenta con optimizaciones especializadas como caché de tablas de broadcast join, push-down de filtros dinámicos y codificación de diccionario para reducir la sobrecarga de memoria y acelerar las lecturas analíticas. El motor cubre una amplia gama de capacidades analíticas, incluyendo la implementación de hash, merge y semi joins, así como agregación paralela multietapa y cálculo de funciones de ventana. Proporciona primitivas para almacenamiento columnar en memoria, decodificación de datos Parquet e integración con almacenamiento en la nube. La extensibilidad se proporciona a través de un sistema de registro de funciones para funciones escalares y agregadas personalizadas, con bindings de alto nivel disponibles para conectar la lógica de C++ a Python.

Rusqlite is an embedded database interface and relational database driver that provides a client library for interacting with SQLite. It functions as an SQL query wrapper, enabling the management of local file-based or in-memory databases through a safe interface. The library allows for the extension of native database capabilities by implementing custom scalar functions, collations, and virtual tables. It also supports the embedding of the database engine directly into the application binary to remove external library dependencies. The project covers a broad range of capabilities including

Dinky is a real-time data platform for developing, deploying, and operating streaming applications based on Apache Flink. It functions as a SQL streaming IDE and a real-time data pipeline orchestrator, providing a web-based environment for writing and verifying queries with integrated logic plan visualization and lineage tracking. The platform acts as a distributed cluster manager, allowing the registration, monitoring, and administration of multiple processing clusters from a centralized interface. It also serves as a change data capture integration tool, synchronizing real-time database cha

Drift is a type-safe SQL persistence library and relational mapper that provides a structured way to map database tables to classes and execute SQL queries with build-time validation. It functions as a type-safe query builder and a wrapper for SQLite and PostgreSQL, eliminating manual result set parsing by binding query outputs to native objects. The project distinguishes itself through a build-time code generation system that produces type-safe APIs and validates raw SQL statements against database versions before execution. It features reactive query streaming, which transforms SQL queries