插入数据库 每次1000条数据

  $sql = "insert into `elconlist` (`ecgrouid`,`elcono`) VALUES";
            for($i = 0; $i < $ecnum; $i++){
                //拼装SQL
                if($i != $ecnum-1){
                    if((float)($i+1)%1000 != 0){
                        $sql .= "(".$ecgrouid.",'".$this->creatElcono($comid)."'),";
                    }else{
                        $sql .= "(".$ecgrouid.",'".$this->creatElcono($comid)."')";
                    }
                }else{
                    $sql .= "(".$ecgrouid.",'".$this->creatElcono($comid)."')";
                }
                if((float)($i+1)%1000 == 0 ){
                    $model->execute($sql);
                    $sql = "insert into `elconlist` (`ecgrouid`,`elcono`) VALUES";
                }else{
                    if($i == $ecnum-1){
                        $model->execute($sql);
                        $sql = "insert into `elconlist` (`ecgrouid`,`elcono`) VALUES";
                    }
                }
            }