通过将查询结果放入foreach中的另一个查询，从Laravel获取结果

Question

I want to get results from Laravel by putting the results from the query into another query in foreach.

$first = DB::connection('store')
->table('entire_store')
->select('name', 'code', 'category', 'direct')
->where('open', 'Y')
->get();

The first query takes the information of the points and processes them into an array.

Match the information of the branches with the workplace in the employee table.

I want to save the workplace information of the employees together.

$temp = array();    
$i =0;    
foreach($first as $key => $item){

    $temp[$i]['name'] = $item->name;
    $temp[$i]['code'] = $item->code;

    $temp[$i]['category'] = $item->category;
    $temp[$i]['direct'] = $item→direct;

    $second = DB::connection('store')
     ->table('entire_employer')
     ->SELECT('mgr_no','mgr_id', 'status')
     ->where('store',$item->code)->get();
    //I tried.
    foreach($second as $key2 => $item2){
        $temp[$i]['mgr_id'] = $item2->mgr_id;
    }
    $i++;

}

I want to store the values from this query in temp_array.

I get an error if I try to save the value of the second query and print the value of temp_array ().

Is there anything more I need to do to check temp_array ()?

Answer 1

What you are trying to do is a LEFT JOIN of the entire_employer table onto the entire_store table. That will do exactly what you're trying to do in your code: match the records of one table with the records on the other; a LEFT join will anchor those records in the primary table (entire_store, in this case).

You can do this in a single query, as such:

$data = DB::connection('store')
  ->table('entire_store')
  ->select(
      'entire_store.name', 
      'entire_store.code', 
      'entire_store.category', 
      'entire_store.direct', 
      'entire_employer.mgr_no', 
      'entire_employer.mgr_id', 
      'entire_employer.status'
  )
  ->leftJoin('entire_employer', 'entire_employer.store', '=', 'entire_store.id')
  ->where('entire_employer.open', 'Y')
  ->get();

You can read more about joins here: https://www.sitepoint.com/understanding-sql-joins-mysql-database/