How does php $_G different data in two data tables?

This is the original call:
$_G['db']->from('dbpre_subject');
$_G['db']->select('*');
$_G['db' ]->where('city_id', array(0,$_CITY['aid']));
$_G['db']->where_concat_like('name,subname', "%{$q}% ");
$_G['db']->where('status', 1);

Now I want to build on this basis and change the two fields c_product_price and c_product_content in the data table called dbpre_subject_product_new. Thank you all in advance

//Attach the source code

!defined('IN_MUDDER') && exit('Access Denied');

$city_id = _get('city_id', null, MF_INT_KEY);
if($city_id>0) {

<code>$citys = $_G['loader']->variable('area');
if(!$city = $citys[$city_id]) redirect('global_area_city_id_invalid');
if(!$city['enabled']) redirect('global_area_city_disabled');
init_city($city_id);</code>

}

$q = _input('keyword', '', MF_TEXT);
if(($_GET['Pathinfo'] || $_GET['Rewrite']) && $q && $_G['charset'] != 'utf-8' && $_G'cfg') {

<code>$q = charset_convert($q,'utf-8',$_G['charset']);</code>

}
$q = str_replace(array("rn","r","n") ,'', _T($q));

$_G['db']->from('dbpre_subject');
$_G['db']->select('*');
$_G['db']->where(' city_id', array(0,$_CITY['aid']));
$_G['db']->where_concat_like('name,subname', "%{$q}%");
$_G[ 'db']->where('status', 1);

$multipage = '';
if($total = $_G['db']->count()) {

<code>$_G['db']->sql_roll_back('from,select,where');
$orderby = array($post['ordersort']=>$post['ordertype']);
$offset = 10;
$start = get_start($_GET['page'], $offset);
$_G['db']->order_by($orderby);
$_G['db']->limit($start, $offset);
$list = $_G['db']->get();
if($total) {
    $multipage = mobile_page($total, $offset, $_GET['page'], url("item/mobile/do/search/keyword/$q/page/_PAGE_"));
}</code>

}

//Display template
if($_G['in_ajax']) {

<code>include mobile_template('item_list_li');
output();</code>

}

$title = 'Search for products:'.$q;
include mobile_template('item_list');

Reply content:

This is the original call:
$_G['db']->from('dbpre_subject');
$_G['db']->select('*');
$_G['db' ]->where('city_id', array(0,$_CITY['aid']));
$_G['db']->where_concat_like('name,subname', "%{$q}% ");
$_G['db']->where('status', 1);

Now I want to build on this basis and change the two fields c_product_price and c_product_content in the data table called dbpre_subject_product_new. Thank you all in advance

//Attach the source code

!defined('IN_MUDDER') && exit('Access Denied');

$city_id = _get('city_id', null, MF_INT_KEY);
if($city_id>0) {

<code>$citys = $_G['loader']->variable('area');
if(!$city = $citys[$city_id]) redirect('global_area_city_id_invalid');
if(!$city['enabled']) redirect('global_area_city_disabled');
init_city($city_id);</code>

}

$q = _input('keyword', '', MF_TEXT);
if(($_GET['Pathinfo'] || $_GET['Rewrite']) && $q && $_G['charset'] != 'utf-8' && $_G'cfg') {

<code>$q = charset_convert($q,'utf-8',$_G['charset']);</code>

}
$q = str_replace(array("rn","r","n") ,'', _T($q));

$_G['db']->from('dbpre_subject');
$_G['db']->select('*');
$_G['db']->where(' city_id', array(0,$_CITY['aid']));
$_G['db']->where_concat_like('name,subname', "%{$q}%");
$_G[ 'db']->where('status', 1);

$multipage = '';
if($total = $_G['db']->count()) {

<code>$_G['db']->sql_roll_back('from,select,where');
$orderby = array($post['ordersort']=>$post['ordertype']);
$offset = 10;
$start = get_start($_GET['page'], $offset);
$_G['db']->order_by($orderby);
$_G['db']->limit($start, $offset);
$list = $_G['db']->get();
if($total) {
    $multipage = mobile_page($total, $offset, $_GET['page'], url("item/mobile/do/search/keyword/$q/page/_PAGE_"));
}</code>

}

//Display template
if($_G['in_ajax']) {

<code>include mobile_template('item_list_li');
output();</code>

}

$title = 'Search for products:'.$q;
include mobile_template('item_list');

What kind of framework do you have? Different frameworks have different syntax