laravel join关联查询代码实例

laravel join关联查询

1、两表关联

$fbainventorytb = (new \app\model\amz\fba\inventoryreport)->gettable();
$producttb = (new \app\model\amz\product)->gettable();
$twinventorytb = (new \app\model\twusa\twusainventory)->gettable();
$qry = \db::table($fbainventorytb);
  $qry->select($fbainventorytb.'.*')
   ->where($fbainventorytb.'.ec_id',1)
   ->leftjoin($producttb, $producttb.'.sku', '=', $fbainventorytb.'.sku')
   ->addselect($producttb.'.id as goods_id',$producttb.'.sku as mfn', $producttb.'.ec_id as pro_ec_id');
//  ->where($producttb.'.ec_id',1); //不应该在此处排除 product 表的ec_id

//  return $qry->tosql();
  $res = $qry->get()->wherein('pro_ec_id',[1, null] );//leftjion 最后排除不符合条件的

2、三表关联

$qry = \db::table($twinventorytb);
  $qry->select($twinventorytb.'.*')
   ->leftjoin($fbainventorytb, $fbainventorytb.'.fnsku', '=', $twinventorytb.'.product_sn')
   ->addselect($fbainventorytb.'.ec_id')
   ->where($fbainventorytb.'.ec_id',1);

  $qry->leftjoin($producttb, $producttb.'.sku', '=', $fbainventorytb.'.sku')
//   ->where($producttb.'.ec_id',1)
   ->addselect($producttb.'.id as goods_id', $producttb.'.sku as mfn', $producttb.'.ec_id as pro_ec_id');

  $res = $qry->get()->wherein('pro_ec_id', [1, null]);

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