Convert Query to Eloquent - sql

Question

How to make that query with eloquent
SELECT employees.first_name, companies.name FROM employees
JOIN companies ON employees.company_id = companies.id
My relationships
public function employees()
{
return $this->hasMany(Employee::class);
}
public function company()
{
return $this->belongsTo(Company::class);
}
I fetching the name with a given ID, but how can I find it for all. Or maybe I am thinking wrong
$employee = $employee->all()->find($id)->company->name;

Answer 1

I assumed your employees Model name as Employee and companies Model name as Company
$employees = Employee::with('company')->get();
if(!empty($employees)){
foreach($employees as $employee){
echo $employee->first_name;
echo $employee->company->name;
}
}
If you want to search per id then you may do as below.
$employee = Employee::with('company')->find($id);
echo $employee->company->name;

Answer 2

$employee = Employee::where('employees.id',$id)
->join('companies','companies.id','=','employees.company_id')
->select('employees.first_name', 'companies.name')
->first();

Answer 3

Firs Of all this is very bad practice:
$employee = $employee->all()->find($id)->company->name;
This returns all employee collection and then searches id in it. You can simply use Employee::find($id)
Now about your query, as I guess your company model has many employee and if you want to find all company employees you have to do like that:
$company->employees()->select('first_name')->get(); // Collection of Employee
If you want to get specific company employee with employee id you can do:
$company->employees()->select('first_name')->where('id', $id)->first(); // null or Employee