如何在laravel 5.4中的两个表上进行左联接

Question

These are my two table's as:

company_industry_type:

law_master :

table company_industry_type has columns lm_id that is assigned to particular id.

i want to fetch the lm_id and law_name from table law_master with respect to the lm_id assigned to id of table company_industry_type

please help me with this, i'm new to laravel.

<?php
  $law = DB::table('tbl_company_industry_type')->pluck('lm_id');
  $law_d = DB::table('tbl_law_master')->whereIn('id',$law)
           ->select('id','lm_id','law_name')->get();
           $res_lms = '';
           foreach($law_d as $law_details)
           {
           ?>
           <span id="sublaw_data">{{ $law_details->lm_id }} 
           ({{ $law_details->law_name }}) <i class="fa fa-remove deleteclass" 
           onclick="delete_law('<?php echo $law_details->id?>')"></i></span>
           <?php
           $res_lms .=$law_details->id.",";
           }
           $res_lawids=trim($res_lms,',');
?>

my code returns only one id's data ie 1 and not for 3,4 for last record of company_industry_type

Answer 1

Using below query you can get result as per your requirements.

DB::table('company_industry_type') ->join('company_industry_type', 'company_industry_type.lm_id', '=', 'law_master.lm_id') ->select('law_master.lm_id', 'law_master.law_name', 'company_industry_type.*') ->get();