How to execute raw queries with Laravel 5.1?

    DB::statement("your query")

I used it for add index to column in migration

Example from Laravel documentation:

$users = DB::table('users')
    ->selectRaw('count(*) as user_count, status')
    ->where('status', '<>', 1)
    ->groupBy('status')
    ->get();

Another example:

$products = DB::table('products')
    ->leftjoin('category','category.product_id','=','products.id')
    ->selectRaw('COUNT(*) as nbr', 'products.*')
    ->groupBy('products.id')
    ->get();

Another example – we can even perform avg() and count() in the same statement.

$salaries = DB::table('salaries')
    ->selectRaw('companies.name as company_name, avg(salary) as avg_salary, count(*) as people_count')
    ->join('companies', 'salaries.company_id', '=', 'companies.id')
    ->groupBy('companies.id')
    ->orderByDesc('avg_salary')
    ->get();

Credits: https://blog.quickadminpanel.com/5-ways-to-use-raw-database-queries-in-laravel/

I found the solution in this topic and I code this:

$cards = DB::select("SELECT
        cards.id_card,
        cards.hash_card,
        cards.`table`,
        users.name,
        0 as total,
        cards.card_status,
        cards.created_at as last_update
    FROM cards
    LEFT JOIN users
    ON users.id_user = cards.id_user
    WHERE hash_card NOT IN ( SELECT orders.hash_card FROM orders )
    UNION
    SELECT
        cards.id_card,
        orders.hash_card,
        cards.`table`,
        users.name,
        sum(orders.quantity*orders.product_price) as total, 
        cards.card_status, 
        max(orders.created_at) last_update 
    FROM menu.orders
    LEFT JOIN cards
    ON cards.hash_card = orders.hash_card
    LEFT JOIN users
    ON users.id_user = cards.id_user
    GROUP BY hash_card
    ORDER BY id_card ASC");