left join in laravel db query code example

Example 1: laravel join

Inner Join 	: ->join('contacts', 'users.id', '=', 'contacts.user_id')
Left Join 	: ->leftJoin('posts', 'users.id', '=', 'posts.user_id')
Right Join 	: ->rightJoin('posts', 'users.id', '=', 'posts.user_id')
Cross Join 	: ->crossJoin('colors')

Advance Queries : 
----------------- 
 		->join('contacts', function ($join) {
            $join->on('users.id', '=', 'contacts.user_id')
                 ->where('contacts.user_id', '>', 5);
        })

Example 2: laravel not in query

DB::table(..)->select(..)->whereNotIn('book_price', [100,200])->get();

Example 3: join in laravel eloquent

$customer = DB::table('customers')
                ->join('shops', 'customers.shop_id', '=', 'shops.shop_id')
                ->where('customer_contact', $contact_no)
                ->get();

Example 4: laravel join

$latestPosts = DB::table('posts')
                   ->select('user_id', DB::raw('MAX(created_at) as last_post_created_at'))
                   ->where('is_published', true)
                   ->groupBy('user_id');

$users = DB::table('users')
        ->joinSub($latestPosts, 'latest_posts', function ($join) {
            $join->on('users.id', '=', 'latest_posts.user_id');
        })->get();

Example 5: count with left join in laravel

$areas = Area::select('areas.*', DB::raw('count(area_id) as connections'))
	->leftJoin('object_areas', 'object_areas.area_id', '=', 'areas.id')
	->groupBy('areas.id')    
	->get();

Example 6: count with left join in laravel

$areas = Area::select('areas.*', DB::raw('count(area_id) as connections'))
	->leftJoin('object_areas', 'object_areas.area_id', '=', 'areas.id')
	->groupBy('areas.id')
	->get();