node package manager


Multi dialect ORM for Node.JS/io.js


Sequelize is a promise-based Node.js/io.js ORM for Postgres, MySQL, MariaDB, SQLite and Microsoft SQL Server. It features solid transaction support, relations, read replication and more.


npm install sequelize

From 3.0.0 and up Sequelize will follow SEMVER. 3.0.0 contains important security fixes so we highly recommend that users upgrade.

If you still use 1.7 please prefer to Upgrading to 2.0 and the changelog between 2.0 and 3.0. 2.1 also has a breaking change.

  • Schema definition
  • Schema synchronization/dropping
  • 1:1, 1:M & N:M Associations
  • Through models
  • Promises
  • Hooks/callbacks/lifecycle events
  • Prefetching/association including
  • Transactions
  • Migrations
  • CLI (sequelize-cli)