Laravel - Getting Started - Subquery Selects

Eloquent also offers advanced subquery support, which allows you to pull information from related tables in a single query. For example, let's imagine that we have a table of flight destinations and a table of flights to destinations. The flights table contains an arrived_at column which indicates when the flight arrived at the destination.

Using the subquery functionality available to the query builder's select and addSelect methods, we can select all of the destinations and the name of the flight that most recently arrived at that destination using a single query:

    use App\Models\Destination;
    use App\Models\Flight;
    return Destination::addSelect(['last_flight' => Flight::select('name')
        ->whereColumn('destination_id', '')