how to group by after the Where function into this query? - php

Question

Hello folks I want to sort books by min and max price but I dont know where I will add the group by function after the WHERE ? here is the query
$sql = "SELECT DISTINCT bk.title AS Title, YEAR(bk.date_released) AS Year, bk.price AS Price, cat.name AS Category, aut.name AS Author FROM books bk
JOIN books_authors bk_aut
ON bk_aut.book_id = bk.id
JOIN authors aut
ON aut.id = bk_aut.author_id
JOIN books_categories bk_cat
ON bk_cat.book_id = bk.id
JOIN categories cat
ON cat.id = bk_cat.cat_id
JOIN books_locations bk_loc
ON bk_cat.book_id = bk.id
JOIN locations loc
ON loc.id = bk_loc.loc_id
";
if (isset($_GET['srch_for'])){
$locations = array();
$getters = array();
$queries = array();
foreach($_GET as $key => $value) {
$temp = is_array($value) ? $value : intval(trim($value));
if (!empty($temp)) {
list($key) = explode("-",$key);
if ($key == 'srch_locations'){
array_push($locations,$value);
}
if (!in_array($key,$getters)){
$getters[$key] = intval(trim($value));
}
}
}
if (!empty($locations)) {
$loc_qry = implode(",",$locations);
}
if(!empty($getters)) {
foreach($getters as $key => $value){
${$key} = $value;
switch($key) {
case 'srch_for':
array_push($queries, "(bk.title LIKE '%$srch_for%' || bk.description LIKE '%$srch_for%' || bk.isbn LIKE '%$srch_for%')");
case 'srch_author':
array_push($queries, "bk_aut.author_id = $srch_author");
break;
case 'srch_language':
array_push($queries, "bk_cat.cat_id = $srch_category");
break;
case 'srch_locations':
array_push($queries, "bk_loc.location_id IN ($loc_qry)");
break;
}
}
}
if(!empty($queries)) {
$sql .= " WHERE ";
$i=1;
foreach($queries as $query) {
if ($i < count($queries)) {
$sql .= $query." AND ";
}else{
$sql .= $query;
}
$i++;
}
}
$sql .= " ORDER BY bk.title ASC";
}
Run code s
I am beginner in php and I cant learn through listening because I am deaf which you help me guys thank you in advance

Answer 1

SELECT Title,Year, sum(Price) AS Price, Category,Author
FROM
(
SELECT DISTINCT bk.title AS Title, YEAR(bk.date_released) AS Year, bk.price AS Price, cat.name AS Category, aut.name AS Author
FROM books bk
JOIN books_authors bk_aut
ON bk_aut.book_id = bk.id
JOIN authors aut
ON aut.id = bk_aut.author_id
JOIN books_categories bk_cat
ON bk_cat.book_id = bk.id
JOIN categories cat
ON cat.id = bk_cat.cat_id
JOIN books_locations bk_loc
ON bk_cat.book_id = bk.id
JOIN locations loc
ON loc.id = bk_loc.loc_id
)T
Group By Title,Year, Category,A
You can use Sub query Like This..