TP5 where queries whether a field in the database contains a value. Fuzzy queries are performed without the like method

 tp5 where Query whether a field in the database contains a value , no need like Methods , Fuzzy query

//TP5 find_in_set usage 

$where['parent_store_id'] = $this->parent_store_id;
            $where['status'] = 'up';
            $where['type'] = 'normal';
            $where['deletetime'] = NULL;
            $data[$k]['children'] = db('shopro_goods')
            ->where($where)
            ->where('find_in_set(8,category_ids)')
            ->order('weigh asc')->select();