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

Dieses Projekt ist ein Cheat Sheet für relationale Datenbanken und eine SQL-Referenz. Es bietet eine Sammlung von Syntax-Beispielen und Query-Dokumentationen für die Verwaltung relationaler Datenbanken mittels Structured Query Language. Das Tool ist als statische Website mit clientseitig durchsuchbarer Dokumentation implementiert, was eine sofortige Filterung technischer Inhalte über einen browserbasierten Index ermöglicht. Die Referenz deckt das Management relationaler Datenbanken ab, einschließlich Datenabruf, Datenbank-Schema-Management und Datensatzpflege. Sie enthält zudem Anleitungen zur Manipulation relationaler Daten durch Table-Joins und die Erstellung aggregierter Berichte.

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 ist ein JDBC-konformes relationales Datenbankmanagementsystem, das in Java geschrieben ist. Es fungiert als einbettbare SQL-Datenbank, die direkt innerhalb eines Anwendungsprozesses ausgeführt werden kann, um Netzwerklatenz zu eliminieren, oder als In-Memory-Datenbank für performante, flüchtige Speicherung. Es enthält zudem eine webbasierte Konsole zur Ausführung von SQL-Befehlen und zur Verwaltung von Schemata. Das System zeichnet sich durch flexible Bereitstellungsmodi aus, einschließlich eines Standalone-Server-Modus für Remote-TCP/IP-Zugriffe und eines gemischten Modus für gleichzeitige lokale und Remote-Konnektivität. Es verfügt über eine Dialekt-Emulationsschicht und Kompatibilitätsmodi, die es ermöglichen, das Verhalten und die Syntax anderer Datenbanksysteme nachzuahmen. Die Engine bietet ein breites Spektrum an Funktionen, darunter ACID-Transaktionen mit Multi-Version Concurrency Control (MVCC), Unterstützung für Geodaten und JSON sowie fortgeschrittene analytische Fensterfunktionen. Es enthält Tools zur Datensicherung durch komprimierte Backups, SQL-Skript-Wiederherstellung und Off-Heap-Speicherverwaltung für große Datensätze. Die Datenbank lässt sich über Standard-JDBC-Treiber und Verbindungs-URLs in Anwendungen integrieren.

sqlean ist eine Sammlung von SQLite-Erweiterungsbibliotheken, die als C-basierte Shared Libraries implementiert sind. Sie bietet eine Suite zusätzlicher skalarer und tabellenwertiger Funktionen, die die nativen Fähigkeiten der SQLite-Datenbank-Engine erweitern. Das Projekt bietet spezialisierte Toolsets für Kryptografie, fortgeschrittene Mathematik, Netzwerke und Dateisystemzugriff. Dazu gehören binäres Hashing und Encoding, statistische Analysen, IP-Adressvalidierung sowie die Möglichkeit, CSV-Dateien oder Dateisystempfade als virtuelle Tabellen abzubilden. Die Bibliothek enthält zudem umfassende Textverarbeitungstools wie reguläre Ausdrücke, Fuzzy-Matching und Unicode-bewusste String-Manipulation. Zusätzliche Funktionen decken hochpräzises Datums- und Zeitmanagement sowie die Generierung eindeutiger Identifikatoren ab.

Velox ist eine leistungsstarke C++-Abfrage-Ausführungs-Engine und eine Bibliothek für spaltenbasierte Datenverarbeitung. Sie dient als kompositionsfähiges Framework zur Implementierung analytischer Query-Engines und bietet einen vektorisierten Ausdrucksauswerter sowie ein Toolkit für Datenmanagementsysteme. Das Projekt zeichnet sich durch die Verwendung vektorisierter spaltenbasierter Ausführung und arena-basierter Speicherallokation zur Verarbeitung großer Datensätze aus. Es bietet spezialisierte Optimierungen wie Broadcast-Join-Table-Caching, Dynamic-Filter-Push-Down und Dictionary-Encoding, um den Speicher-Overhead zu reduzieren und analytische Lesezugriffe zu beschleunigen. Die Engine deckt ein breites Spektrum analytischer Funktionen ab, einschließlich der Implementierung von Hash-, Merge- und Semi-Joins sowie mehrstufiger paralleler Aggregation und der Berechnung von Fensterfunktionen. Sie bietet Primitive für spaltenbasierte In-Memory-Speicherung, Parquet-Datendekodierung und die Integration mit Cloud-Speichern. Erweiterbarkeit wird durch ein Funktionsregistrierungssystem für benutzerdefinierte Skalar- und Aggregatfunktionen geboten, wobei High-Level-Bindings verfügbar sind, um die C++-Logik mit Python zu verbinden.

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