Optimization with many queries in page - php

Question

I have in my page 5 queries that im wishing to have just one query if its possible , i dont know if there is a better strategy to what im doing or its ok .
this is my main query to load the books
$mess = $mysqli->prepare('SELECT * from ( SELECT m.id, cm.voteup,
cm.votedown,cr.book_descr FROM books m
INNER JOIN books_vote cm ON cm.bookid = m.id
INNER JOIN book_info cr ON cr.bookid = m.id
WHERE bookid = ? ORDER BY m.date DESC LIMIT 30)ddd
ORDER BY m.date ASC');
$mess->bind_param("i", $book);
$mess->execute();
$mess->store_result();
$mess->bind_result($id,$voteup,$votedown);
while($row = $mess->fetch()){
// im fetching here in this <div class='areabooks'>
}
Then i reset the query to fetch in other div with IF condition
$mess->data_seek(0);
while($row = $mess->fetch()){
if($voteup - $votedown >= 5){
//I fetch here in this <div class='areabooks2'>
}
}
Then im cheking the top MAX(voteup - votedown ) with this query
$messtop = $mysqli->prepare('SELECT ..........
INNER JOIN ...
INNER JOIN ( select id ,MAX(voteup - votedown ) as maxe
from books
where voteup - votedown >= 5
group by id ) tt
WHERE bookid = ?
ORDER BY maxe DESC,cm.votedown asc,cm.voteup DESC
limit 1');
$messtop->bind_param("i", $book);
$messtop->execute();
$messtop->store_result();
$messtop->bind_result($id,$voteup,$votedown);
$messtop->fetch();
// then i fetch in this <div class='topbook' >
Then i reset the first query again to fetch in other div with IF condition
$mess->data_seek(0);
while($row = $mess->fetch()){
if($votedown - $voteup >= 5){
//I fetch here in this <div class='areabooks3' >
}
}
Then im getting the top MAX(votedown - voteup ) with this query
$messtop = $mysqli->prepare('SELECT ..........
INNER JOIN ...
INNER JOIN ( select id ,MAX(votedown - voteup) as maxe
from books where votedown - voteup >= 5
group by id ) tt
WHERE bookid = ?
ORDER BY maxe DESC,cm.voteup ASC,cm.votedown DESC
limit 1');
$messdown->bind_param("i", $book);
$messdown->execute();
$messdown->store_result();
$messdown->bind_result($id,$voteup,$votedown);
$messdown->fetch();
// then i fetch in this <div class='topbottonbook' >
What im looking for is if there is a strategy to use just one query and fetch it in all these divs , those divs are separated like that .
<first div>
<second div>
<3rd div>
<4th div>
5th div
How to simplify this thanks ?

Answer 1

I doubt if the 3 queries can be combined into one.
First query:
Postpone the JOIN until you have the 30 'latest' bookids. That is, move the JOINs out to the outer SELECT.
Also have INDEX(id, date). But I am confused. Ordinarily id is the PRIMARY KEY, hence unique. Yet the query implies that one book has multiple dates. What gives? (Please provide SHOW CREATE TABLE.)
The mysql commandline tool (or Workbench or phpmyadmin) is your friend. Manually run the queries using one of them. I think that you will find errors. Please fix.