Re: [PHP] Multiple queries in PHP
Ashley Sheridan wrote: I've run into a bit of a problem. I put together a query using mysql variables in the form set @m:= 0; with the select that uses it directly after. For any wondering, the select was using it as an incremental value which can't be hard coded, as the value will depend on the ordering of the results of the query itself. The problem seems to be that while phpMyAdmin would execute this double query perfectly well, php using mysql_query() was having problems, as apparently it can't actually run multiple queries. I don't know about the PHP mysql_query(), but the MySQL C API works fine with multiple queries, it just has to be specifically enabled - the default is one query per call. However, it looks like the multiple query option is not supported by PHP: http://php.net/manual/en/mysqli.real-connect.php For security reasons the MULTI_STATEMENT flag is not supported in PHP. If you want to execute multiple queries use the mysqli_multi_query() function. /Per Jessen, Zürich -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Multiple queries in PHP
Per Jessen wrote: Ashley Sheridan wrote: I've run into a bit of a problem. I put together a query using mysql variables in the form set @m:= 0; with the select that uses it directly after. For any wondering, the select was using it as an incremental value which can't be hard coded, as the value will depend on the ordering of the results of the query itself. The problem seems to be that while phpMyAdmin would execute this double query perfectly well, php using mysql_query() was having problems, as apparently it can't actually run multiple queries. I don't know about the PHP mysql_query(), but the MySQL C API works fine with multiple queries, it just has to be specifically enabled - the default is one query per call. However, it looks like the multiple query option is not supported by PHP: http://php.net/manual/en/mysqli.real-connect.php For security reasons the MULTI_STATEMENT flag is not supported in PHP. If you want to execute multiple queries use the mysqli_multi_query() function. Same for mysql_query: mysql_query() sends a unique query (multiple queries are not supported)... -- Postgresql php tutorials http://www.designmagick.com/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Multiple queries in PHP
2009/1/25 Ashley Sheridan a...@ashleysheridan.co.uk: I've run into a bit of a problem. I put together a query using mysql variables in the form set @m:= 0; with the select that uses it directly after. For any wondering, the select was using it as an incremental value which can't be hard coded, as the value will depend on the ordering of the results of the query itself. The problem seems to be that while phpMyAdmin would execute this double query perfectly well, php using mysql_query() was having problems, as apparently it can't actually run multiple queries. Now the full query looks something like this: mysql_query(SELECT @m:=0;); $query = SELECT * FROM( SELECT profiles.id, ROUND(AVG(rated.score)) AS `rating`, COUNT(rated.score) AS `total`, @m:=...@m+1 AS rank FROM `rated` LEFT JOIN `profiles` ON (profiles.id = rated.profile_id) GROUP BY rated.profile_id ORDER BY rating DESC, total DESC) AS ranking WHERE ranking.id=$id; $result = mysql_query($query); which seems to be working OK so far, but does anyone know of any potential pitfalls I might face when doing something like this? It's a security feature to prevent SQL injection. AFAIK you'll have no problems so long as all calls to mysql_query happen on the same DB connection so you might want to start using the linkid parameter. -Stuart -- http://stut.net/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Multiple queries in PHP
PHP/MySQL and the various functionality such as @var are all per-connection expressly so that you CAN do this type of stuff. I'd be pretty shocked if you had any problems. -- Some people ask for gifts here. I just want you to buy an Indie CD for yourself: http://cdbaby.com/search/from/lynch -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] multiple queries, one transaction
On Fri, May 20, 2005 2:02 pm, mayo said: I have a site where I need to do multiple queries in sequence. In sequence, or as one single atomic un-interruptable action? Cuz, like, just doing them in sequence is real straight forward: $query = select ... ; $meaningful_variable_names_are_good = mysql_query($query... $query = select ... ; $another_good_variable = mysql_query($query... I see there is a way to do consider all querys and to fail the entire procedure if one query fails. It's a BEGIN and COMMIT statement. That is called a transaction. And it is rather hefty performance penalties on your database. And you need your tables to be innoDB or ??? but not the default MyISAM in MySQL. mysql_query(BEGIN); // starts the transaction Just put your queries in here. ONLY do this if the queries succeed! If they fail, do mysql_query(ROLLBACK); mysql_query(COMMIT); // ends the transaction I'm just not certain how it's used. It's a lot easier to do the queries (you did all the hard work already) than it is to figure out if you REALLY need them or not... If you can avoid the transaction, and still have quality data and quality application, you can gain significant performance that way... -- Like Music? http://l-i-e.com/artists.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Multiple Queries
$result = mysql_query(SELECT * FROM classes3 WHERE c_d_sun='1' AND
c_s_sun_1_hr='5');
while($row = @ mysql_fetch_array($result)) {
if($row[c_s_sun_1_hr] != 5) {
echo n/a;
} else {
echo
$row[c_s_sun_1_hr]:$row[c_s_sun_1_min]$row[c_s_sun_1_dn]br;
echo a title=\$row[c_desc]\$row[c_title]/a;
}
}
I have multiple segments of this, the query and the formatting are
different, is there another way to go about this?
-Original Message-
From: Humberto Silva [mailto:[EMAIL PROTECTED]
Sent: Thursday, January 15, 2004 10:52 AM
To: [EMAIL PROTECTED]
Subject: RE: [PHP] Multiple Queries
Can you paste the code please...
Humberto Silva
World Editing
Portugal
-Original Message-
From: Arthur Pelkey [mailto:[EMAIL PROTECTED]
Sent: quinta-feira, 15 de Janeiro de 2004 15:46
To: [EMAIL PROTECTED]
Subject: [PHP] Multiple Queries
I am new this.
I have a page that has multiple queries on it, I want to do doing the
following:
Query a mysql db multiple times in the same page, but i must be missing
something, I keep getting these AFTER the first queryis successful:
Warning: mysql_fetch_array(): supplied argument is not a valid MySQL
result resource in /path/php_file.php on line line_number
Can someone point in the right direction on how to do multiple queries,
some are not querying the same db btw.
-Art
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Re: [PHP] Multiple Queries
From: Arthur Pelkey [EMAIL PROTECTED] I have a page that has multiple queries on it, I want to do doing the following: Query a mysql db multiple times in the same page, but i must be missing something, I keep getting these AFTER the first queryis successful: Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in /path/php_file.php on line line_number Can someone point in the right direction on how to do multiple queries, some are not querying the same db btw. There's no real trick to it. You can have as many mysql_query() calls as you want. You probably just need to check that you're assigning the result of it to a unique variable each time and not overwriting results or rows from previous queries. Post your code if you want, but your error means your query is failing or you're using the wrong variable in one of the mysql_fetch_*() functions. Using mysql_error() will help here. ---John Holmes... -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Multiple queries
Heya: On Fri, May 31, 2002 at 09:55:27AM +0100, Caspar Kennerdale wrote: I have one table, with a name and info about the project and upto 5 urls of where the jpeg lies. Are you talking about five fields in the table containing up to five URI's for each project? That's not cool. You should normalize that structure. Put the project info in one table and then the URI's in anohter. This allows you to efficiently store as few or as many URI's as your heart desires. Now, I then have a piece of javascript which tells frame 2 to update itself. And what about people looking at your site who don't have Java'sCrap running? So I have parsed the record ID to it and it then open a query to the database and outputs the relevant information about the artworks. Lastly a third query is also sent to the database to see if there are any other projects in the gallery by the same artist- and then create a list of related links. Sounds right. --Dan -- PHP classes that make web design easier SQL Solution | Layout Solution | Form Solution sqlsolution.info | layoutsolution.info | formsolution.info T H E A N A L Y S I S A N D S O L U T I O N S C O M P A N Y 4015 7 Av #4AJ, Brooklyn NY v: 718-854-0335 f: 718-854-0409 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Multiple queries on multiple databases
Just use MySQL_select_db() to switch between databases between your
queries. Remember to switch back, too.
Or you can just give the database name in your query:
SELECT * FROM database.table WHERE ...
---John Holmes...
-Original Message-
From: d3crypt [mailto:[EMAIL PROTECTED]]
Sent: Friday, May 24, 2002 5:35 PM
To: [EMAIL PROTECTED]
Subject: [PHP] Multiple queries on multiple databases
Hello,
I'd like to know the method to connect and query multiple databases in
the same php script ...
I've to do something like this :
do query on db1_on_server_1
while( get results of query on db1_on_server_1){
do query on db2_on_server_2
}
the structure of the db is this one :
# Table structure for table 'attendees' in db 'training2'
#
CREATE TABLE attendees (
attendee_ID int(8) NOT NULL auto_increment,
training_requester_ID int(8),
PRIMARY KEY (attendee_ID),
UNIQUE attendees_ID (attendee_ID)
);
# Dumping data for table 'attendees'
#
INSERT INTO attendees (attendee_ID, training_requester_ID) VALUES (
'1', '299');
# Table structure for table 'people_info' in db 'octopus'
#
CREATE TABLE people_info (
id int(255) DEFAULT '0' NOT NULL,
l_name varchar(255) NOT NULL
);
# Dumping data for table 'people_info'
#
INSERT INTO people_info (id, l_name) VALUES ('299', 'Forseilles');
I've tried the following script, but it gives me a 'Warning: Supplied
argument is not a valid MySQL result resource in
g:\htdocs\training\viewmytrainings.php on line 23' :
?
$octopus=localhost,,,octopus;
$training=localhost,,,training2;
function connect($database){
$array=explode(,, $database);
$host=$array[0];
$user=$array[1];
$pass=$array[2];
$db=$array[3];
$connect=mysql_connect($host,$user,$pass) or die (unable to
connect host $hostbr);
mysql_select_db($db) or die (unable to select $db in
$hostbr);
return($connect);
}
$connect1=connect($training);
$connect2=connect($octopus);
$query=select * from attendees order by training_ID asc;
$result=mysql_query($query, $connect1);
$row=mysql_fetch_row($result);
echo $row[1];
$queryx=select l_name from people_info where id='$row[1]';
$resultx=mysql_query($queryx, $connect2);
$rowx=mysql_fetch_row($resultx);
echo $rowx[0];
?
Any idea ? Thanks for your help ...
(PHP Version 4.0.6)
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d3crypt aka p
$ drink bottle; opener
bottle: cannot open
opener: not found
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