add index to a table in laravel code example

Example 1: laravel rollback last migration

php artisan migrate:rollback --step=1

Example 2: laravel migration index

$table->index(['account_id', 'created_at']);

Example 3: laravel dropIndex

Schema::table('geo', function (Blueprint $table) {
    $table->dropIndex(['state']); // Drops index 'geo_state_index'
});