Sequelize is a promise-based Object-Relational Mapping (ORM) library for Node.js that provides a structured interface to interact with relational databases such as PostgreSQL, MySQL, SQLite, and MSSQL. It enables defining models that map to database tables, supports associations (one-to-one, one-to-many, many-to-many), and includes features like migrations, validations, and hooks. The library offers built-in data types, query builders, and transaction support, along with eager and lazy loading for related data, making it easier to manage complex data models with a programmatic API.

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Sequelize

Promise-based ORM for Node.js SQL databases with models, migrations.

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