TLDR
Sequelize is a promise-based Node.js ORM for Postgres, MySQL, MariaDB, SQLite and Microsoft SQL Server. It features solid transaction support, relations, eager and lazy loading, read replication and more. It is available via npm (or yarn) and can be easily installed via the NodeJS module. It can be used to create a single connection to connect to the database from a single process. Querying is a raw query, and you can use the function sequelize.query.via the TL;DR App
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