remove a migration code example

Example 1: ef remove migration

/*to remove the last migration:*/
/*Visual Studio:*/
Remove-Migration
/*.Net Core CLI:*/
dotnet ef migrations remove

Example 2: how to delete migrations in django

python3 manage.py rm -r name/migrations

Example 3: laravel migration drop foreign keys

$table->dropPrimary('users_id_primary');

Example 4: delete a migration laravel

// delete a migration safely from laravel 
delete migration from database/migrations/ directory
and also delete entry from migrations table

Example 5: drop column adonisjs migration

down () {
    //Remove Default Value Constraint
    this.alter('mytable', (table) => {
      table.boolean('column1')
      table.boolean('column2')
    })

    //Remove Columns
    this.alter('mytable', (table) => {
      table.dropColumn('column1')
      table.dropColumn('column2')
    })
  }