GreenDAO vs Sugar ORM: What are the differences?

## Introduction
This Markdown code outlines the key differences between GreenDAO and Sugar ORM.

1. **Database Support:** GreenDAO supports SQLite databases, while Sugar ORM supports a variety of database systems such as SQLite, MySQL, and others through its ActiveAndroid library.
2. **Performance:** GreenDAO is known for its high performance due to its use of direct SQL queries, whereas Sugar ORM is sometimes criticized for slower performance due to its extensive use of reflection.
3. **Ease of Use:** GreenDAO requires more boilerplate code for setting up entities compared to Sugar ORM, which provides a more minimalist and user-friendly approach to defining data models.
4. **Relationship Handling:** GreenDAO has built-in support for one-to-many and many-to-many relationships between entities, while Sugar ORM requires custom implementation for handling complex relationships.
5. **Querying Flexibility:** GreenDAO offers a more powerful query API allowing for complex queries and optimizations, whereas Sugar ORM provides a simpler query interface that may be sufficient for basic operations but lacks advanced features.
6. **Community and Support:** GreenDAO has a relatively smaller community compared to Sugar ORM, which has a larger user base and more active development and support from the community.

In Summary, the key differences between GreenDAO and Sugar ORM lie in database support, performance, ease of use, relationship handling, querying flexibility, and community support. Each framework has its strengths and weaknesses, making them suitable for different use cases based on project requirements.