sequelize:tldr:17282

The command sequelize db:migrate:undo:all is used in the context of Sequelize, which is an Object-Relational Mapping (ORM) tool for Node.js that simplifies database management.

sequelize db:migrate:undo:all is a command that undoes all the migrations that have been applied to your database. It reverts the changes made by all the migrations in reverse order, undoing the migration operations one by one until the initial state of the database is reached.

Let's break down the command into its components:

• sequelize: This is the command-line interface (CLI) tool for Sequelize that allows you to interact with your database using Sequelize methods.

• db: This is a sub-command that tells Sequelize CLI that we are performing a database level operation.

• migrate: This is a sub-command under the db command that indicates we are working with migrations.

• undo:all: This is another sub-command under the migrate command that specifies we want to undo all the migrations. It reverses the effect of all previously applied migrations.

By executing the sequelize db:migrate:undo:all command, you effectively roll back or undo all the migrations in reverse chronological order, eventually reverting your database back to its initial state.