# SQLAlchemy

> free software SQL toolkit and object-relational mapper

**Wikidata**: [Q1092514](https://www.wikidata.org/wiki/Q1092514)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/SQLAlchemy)  
**Source**: https://4ort.xyz/entity/sqlalchemy

## Summary
SQLAlchemy is a free software SQL toolkit and object-relational mapper for Python. It provides developers with a full suite of well-known enterprise-level persistence patterns, designed for efficient and high-performing database access. SQLAlchemy is widely used in the Python ecosystem for database operations.

## Key Facts
- SQLAlchemy is free software distributed under the MIT License
- It is a Python package that serves as a database interface, query language, and software library
- The project has multiple versions released between 2008 and 2010, including 0.4.8 (2008-10-12), 0.5.0 through 0.5.8 (2009-2010)
- SQLAlchemy's official website is https://www.sqlalchemy.org/ and its source code is hosted on GitHub at https://github.com/sqlalchemy/sqlalchemy
- It is used by various projects including LangChain, Gramps Web API, SickChill, and release-monitoring
- SQLAlchemy has a Wikipedia page available in 10 languages including English, German, French, and Japanese
- The project has a sitelink count of 17 and is available through multiple package managers including PyPI, Arch Linux, and Gentoo

## FAQs
### Q: What is SQLAlchemy used for?
A: SQLAlchemy is used as an SQL toolkit and object-relational mapper for Python, allowing developers to interact with databases using Python objects and providing a full suite of enterprise-level persistence patterns for efficient database access.

### Q: Is SQLAlchemy free to use?
A: Yes, SQLAlchemy is free software distributed under the MIT License, which allows users to freely run, study, change, and distribute the software and modified versions.

### Q: What programming language is SQLAlchemy written in?
A: SQLAlchemy is written in Python, as it is a Python package designed to work within the Python ecosystem for database operations.

## Why It Matters
SQLAlchemy matters because it bridges the gap between object-oriented programming in Python and relational databases, providing a powerful and flexible toolkit that has become a standard in the Python community. It solves the impedance mismatch problem between object-oriented languages and relational databases by offering both a high-level ORM for developers who prefer working with objects and a low-level SQL expression language for those who need fine-grained control. SQLAlchemy's design patterns and architecture have influenced how database access is handled in Python applications, making it easier for developers to write database-agnostic code that can work across different database systems. Its widespread adoption has created a rich ecosystem of tools and extensions, and it has become an essential component in many Python web frameworks and data processing applications.

## Notable For
- Being one of the most comprehensive and well-designed SQL toolkits available for Python
- Providing both high-level ORM capabilities and low-level SQL expression language in a single package
- Supporting multiple database backends with a consistent API, making applications more portable
- Having a mature and stable codebase with regular releases since 2008
- Being widely adopted across the Python ecosystem and integrated into numerous popular frameworks and applications

## Body
### Development and History
SQLAlchemy was developed as a Python SQL toolkit and object-relational mapper, with its first major version 0.4.8 released on October 12, 2008. The project has maintained active development with version 0.5.x releases spanning from January 2009 to January 2010, showing consistent improvement and feature additions. The software is maintained on GitHub with the primary repository at https://github.com/sqlalchemy/sqlalchemy.

### Technical Architecture
SQLAlchemy provides a dual approach to database interaction, offering both an Object-Relational Mapping (ORM) system and a SQL expression language. This design allows developers to choose between working with Python objects (ORM) or writing SQL expressions directly, depending on their needs and preferences. The toolkit supports various database backends and provides a consistent interface across different database systems.

### Licensing and Distribution
SQLAlchemy is distributed under the MIT License, a permissive free software license that allows for commercial use, modification, and distribution. This licensing model has contributed to its widespread adoption in both open-source and commercial projects. The software is available through multiple distribution channels including PyPI, various Linux package managers, and direct download from the official website.

### Ecosystem Integration
SQLAlchemy integrates with numerous Python projects and frameworks. It is used by LangChain for language model applications, Gramps Web API for genealogy database services, SickChill for video library management, and release-monitoring for cross-distribution upstream release tracking. This broad integration demonstrates SQLAlchemy's versatility and reliability as a database toolkit.

### Community and Support
The project maintains an active presence with documentation available in multiple languages on Wikipedia, a dedicated website with English content, and community support through platforms like Stack Overflow. The software has been analyzed and documented on platforms like Open Hub, providing transparency about its development and usage statistics.

## Schema Markup
```json
{
  "@context": "https://schema.org",
  "@type": "SoftwareApplication",
  "name": "SQLAlchemy",
  "description": "Free software SQL toolkit and object-relational mapper for Python",
  "url": "https://www.sqlalchemy.org/",
  "sameAs": [
    "https://en.wikipedia.org/wiki/SQLAlchemy",
    "https://github.com/sqlalchemy/sqlalchemy",
    "https://www.wikidata.org/wiki/Q1066568"
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  "applicationCategory": "Database",
  "license": "https://opensource.org/licenses/MIT",
  "programmingLanguage": "Python"
}

## References

1. [Source](http://www.sqlalchemy.org/download.html)
2. [The sqlalchemy Open Source Project on Open Hub: Licenses Page. Open Hub](https://www.openhub.net/p/sqlalchemy/licenses)
3. [The sqlalchemy Open Source Project on Open Hub: Languages Page. Open Hub](https://www.openhub.net/p/sqlalchemy/analyses/latest/languages_summary)
4. [Release 0.4.8. 2008](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_4_8)
5. [Release 0.5.0. 2009](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_5_0)
6. [Release 0.5.1. 2009](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_5_1)
7. [Release 0.5.2. 2009](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_5_2)
8. [Release 0.5.3. 2009](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_5_3)
9. [Release 0.5.3. 2009](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_5_3)
10. [Release 0.5.4. 2009](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_5_4)
11. [Release 0.5.4. 2009](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_5_4)
12. [Release 0.5.5. 2009](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_5_5)
13. [Release 0.5.5. 2009](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_5_5)
14. [Release 0.5.6. 2009](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_5_6)
15. [Release 0.5.6. 2009](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_5_6)
16. [Release 0.5.7. 2009](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_5_7)
17. [Release 0.5.7. 2009](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_5_7)
18. [Release 0.5.8. 2010](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_5_8)
19. [Release 0.5.8. 2010](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_5_8)
20. [Release 0.6.0. 2010](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_6_0)
21. [Release 0.6.0. 2010](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_6_0)
22. [Release 0.6.1. 2010](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_6_1)
23. [Release 0.6.1. 2010](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_6_1)
24. [Release 0.6.2. 2010](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_6_2)
25. [Release 0.6.2. 2010](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_6_2)
26. [Release 0.6.3. 2010](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_6_3)
27. [Release 0.6.3. 2010](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_6_3)
28. [Release 0.6.4. 2010](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_6_4)
29. [Release 0.6.4. 2010](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_6_4)
30. [Release 0.6.5. 2010](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_6_5)
31. [Release 0.6.5. 2010](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_6_5)
32. [Release 0.6.6. 2011](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_6_6)
33. [Release 0.6.6. 2011](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_6_6)
34. [Release 0.6.7. 2011](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_6_7)
35. [Release 0.6.7. 2011](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_6_7)
36. [Release 0.6.8. 2011](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_6_8)
37. [Release 0.6.8. 2011](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_6_8)
38. [Release 0.6.9. 2012](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_6_9)
39. [Release 0.6.9. 2012](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_6_9)
40. [Release 0.7.0. 2011](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_7_0)
41. [Release 0.7.0. 2011](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_7_0)
42. [Release 0.7.1. 2011](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_7_1)
43. [Release 0.7.1. 2011](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_7_1)
44. [Release 0.7.2. 2011](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_7_2)
45. [Release 0.7.2. 2011](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_7_2)
46. [Release 0.7.3. 2011](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_7_3)
47. [Release 0.7.3. 2011](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_7_3)
48. [Release 0.7.4. 2011](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_7_4)
49. [Release 0.7.4. 2011](https://github.com/sqlalchemy/sqlalchemy/releases/tag/rel_0_7_4)
50. [Release 0.7.5. 2012](https://github.com/zzzeek/sqlalchemy/releases/tag/rel_0_7_5)