Why mysql sql query is taking long time to get the result? - php

Question

In mysql db table contact_details I have almost 12,000 rows and it's continuously updating.
Now I have a search form where I need to search data from the db table contact_details
For e.g : I am searching 2 in type column from contact_details table and there are almost 11,000 records of 2.
In this situation, my sql query is taking long time to produce result ! Sometime it's showing me Maximum time exceed. What should I do to get the result more quickly ?
Here is the contact_details table look like :
Here is the search form look like with error message :
I am using following sql query to get the search result :
if(!empty($ad_keyword)) {
$getSearch = "SELECT * FROM (SELECT GROUP_CONCAT(DISTINCT keywordName ORDER BY keywordName) as keywordName, ";
}
else{
$getSearch = "SELECT ";
}
$getSearch .= " cd.cdid, cd.family_name, cd.given_name, cd.department, cd.title, company.*, users.nickname, contact_label.label_data FROM
contact_details as cd
LEFT JOIN users ON users.user_id = cd.user_id
LEFT JOIN company ON company.cid = cd.cid
LEFT JOIN contact_docs ON contact_docs.cdid = cd.cdid
LEFT JOIN userkeywords ON userkeywords . cdid = cd . cdid
LEFT JOIN keywords ON keywords . kid = userkeywords . kid
LEFT JOIN contact_label ON contact_label.cdid = cd.cdid
WHERE 1=1 ";
if(!empty($ad_company)){
$getSearch .= "AND company.company_name LIKE '$ad_company%' ";
}
if(!empty($ad_fname)){
$getSearch .= "AND cd.family_name LIKE '$ad_fname%' ";
}
if(!empty($ad_department)){
$getSearch .= "AND cd.department LIKE '$ad_department%' ";
}
if(!empty($ad_mp)){
$getSearch .= "AND cd.mp >= '$ad_mp' ";
}
if(!empty($ad_e2)){
$getSearch .= "AND cd.e2 >= '$ad_e2' ";
}
if(!empty($ad_pl)){
$getSearch .= "AND cd.pl >= '$ad_pl' ";
}
if(!empty($ad_ap)){
$getSearch .= "AND cd.ap >= '$ad_ap' ";
}
if(!empty($ad_j2)){
$getSearch .= "AND cd.j2 >= '$ad_j2' ";
}
if(!empty($ad_agreater)){
$getSearch .= "AND cd.age >= '$ad_agreater' ";
}
if(!empty($ad_aless)){
$getSearch .= "AND cd.age <= '$ad_aless' ";
}
if(!empty($ad_agreater) && !empty($ad_aless)){
$getSearch .= "AND cd.age BETWEEN '$ad_agreater' AND '$ad_aless'";
}
if(!empty($ad_sgreater)){
$getSearch .= "AND cd.comp >= '$ad_sgreater' ";
}
if(!empty($ad_sless)){
$getSearch .= "AND cd.comp <= '$ad_sless' ";
}
if(!empty($ad_sgreater) && !empty($ad_sless)){
$getSearch .= "AND cd.comp BETWEEN '$ad_sgreater' AND '$ad_sless'";
}
if(!empty($ad_noteterm)){
$ad_noteterm = preg_replace("/\{ASUSIBBIR\}(.+?)\s:\s(.+?)\{ASUSIBBIR\}/m", "$2", $ad_noteterm);
$getSearch .= "AND LOCATE('$ad_noteterm', REPLACE (notesUpdate, '{ASUSIBBIR}', ' '))";
}
if(!empty($ad_cnote)){
$getSearch .= "AND LOCATE('$ad_cnote', cd.characterNotes)";
}
if(!empty($ad_twork)){
$getSearch .= "AND contact_label.label_data LIKE '%$ad_twork%'";
}
if(!empty($ad_tmobile)){
$getSearch .= "AND cd.mobile_phone like '%$ad_tmobile%'";
}
if(!empty($ad_resume)){
$getSearch .= "AND LOCATE('$ad_resume', contact_docs.file_content)"; //is this the resume? yes
}
if(!empty($ad_datefrom) && empty($ad_dateto)){
$getSearch .= "AND cd.created_date BETWEEN '$ad_datefrom'AND '$date'";
}
if(!empty($ad_dateto) && empty($ad_datefrom)){
$getSearch .= "AND cd.created_date BETWEEN date('0000-00-00') AND '$ad_dateto' ";
}
if(!empty($ad_datefrom) && !empty($ad_dateto)){
$getSearch .= "AND cd.created_date BETWEEN '$ad_datefrom' AND '$ad_dateto'";
}
if(!empty($ad_type)){
$getSearch .= "AND cd.type = '$ad_type' ";
}
if(!empty($ad_wemail)){
$getSearch .= "AND cd.email LIKE '$ad_wemail%'";
}
if(!empty($ad_pemail)){
$getSearch .= "AND cd.email_private LIKE '$ad_pemail%'";
}
if(!empty($ad_title)){
$getSearch .= "AND cd.title LIKE '$ad_title%'";
}
if(!empty($ad_source)){
$getSearch .= "AND cd.source LIKE '$ad_source%'";
}
if(!empty($ad_consultant)){
$getSearch .= "AND users.nickname LIKE '%$ad_consultant%'";
}
if(!empty($ad_keyword)){
$ad_keyword_param = str_replace(",","','",$ad_keyword);
$getSearch .= " AND keywords.keywordName IN ('$ad_keyword_param') ";
}
$getSearch .= " GROUP BY cd.user_id, cd.cid, cd.cdid ";
if(!empty($ad_keyword)){
$ad_keyword_param = str_replace(",",",",$ad_keyword);
$getSearch .= " ) as a WHERE keywordName LIKE '$ad_keyword_param%' ";
}

Answer 1

Implement indexing
Instead of fetch '*' specify only the required column name.
instead of subquery try to use join
use 'limit' clause

Answer 2

First You need to do indexing with your all table like users,company etc...
about that error solving of fatal error please put below line in php script in first line
ini_set('max_execution_time', 0);