laravel when

1Inner Join 	: ->join('contacts', 'users.id', '=', 'contacts.user_id')
2Left Join 	: ->leftJoin('posts', 'users.id', '=', 'posts.user_id')
3Right Join 	: ->rightJoin('posts', 'users.id', '=', 'posts.user_id')
4Cross Join 	: ->crossJoin('colors')
5
6Advance Queries : 
7----------------- 
8 		->join('contacts', function ($join) {
9            $join->on('users.id', '=', 'contacts.user_id')
10                 ->where('contacts.user_id', '>', 5);
11        })
12  

1DB::table('users')->insert([
2    'email' => 'kayla@example.com',
3    'votes' => 0
4]);

1/* you may only want to apply a where statement if a given input value
2is present on the incoming request.
3*/
4$role = $request->input('role');
5
6$users = DB::table('users')
7                ->when($role, function ($query, $role) {
8                    return $query->where('role_id', $role);
9                })
10                ->get();

1$affected = DB::table('users')
2              ->where('id', 1)
3              ->update(['votes' => 1]);

1DB::table(..)->select(..)->whereNotIn('book_price', [100,200])->get();

1 $customer = DB::table('customers')
2                ->join('shops', 'customers.shop_id', '=', 'shops.shop_id')
3                ->where('customer_contact', $contact_no)
4                ->get();