Solved

Batch: do query on 200+ DB's at once

Posted on 2008-10-30
5
282 Views
Last Modified: 2013-12-13
I have 200+ mySQL databases, all with the same user privalages.

I want to perform two SQL queries on all of them at once either from a command line or using PHP.

I have a list of all DBs in a long list with one on each line.

    db_sdfdsfd1
    db_jhgdj34
    db_xz45g
    ....


ALTER TABLE `xyz_Pages`
  DROP `showMenu`,
  DROP `showSitemap`,
  DROP `showSEO`;
 
ALTER TABLE `xyz_Pages`  
ADD  `showMenu` TINYINT NOT NULL DEFAULT '1',
ADD `showSitemap` TINYINT NOT NULL DEFAULT '1',
ADD `showSEO` TINYINT NOT NULL DEFAULT 1 ;

Open in new window

0
Comment
Question by:hankknight
5 Comments
 
LVL 25

Expert Comment

by:Tomas Helgi Johannsson
ID: 22840358
    Hi!

You can use the  TOAD for MySQL (http://www.toadsoft.com/toadmysql/Overview.htm) for that.
It has the feature to connect to N databases and issue the same SQL on every connection.

Regards,
   Tomas Helgi
0
 
LVL 1

Expert Comment

by:1eEurope
ID: 22840377
just use a readfile in php to go threw your databases in a foreach-loop. in the loop select the database (use myDatabase) and run the statements.
0
 
LVL 109

Expert Comment

by:Ray Paseur
ID: 22840444
Back up all your data bases before you try anything!

Do you have the same user id and password and host for all the data bases?

Thanks, ~Ray
0
 
LVL 6

Accepted Solution

by:
cr4ck3rj4ck earned 500 total points
ID: 22840446
This will have a LONG execution time but essentially this should suit your needs.

Hope this helps.
	$dbConnect = mysql_pconnect($dbHost, $dbUser, $dbPass); 
	$dbList = file('DBList.txt');
	foreach ($dbList as $dbName)
	{
		mysql_select_db(trim($dbName), $dbConnect);
		$querySQL = "ALTER TABLE `xyz_Pages` DROP `showMenu`, DROP `showSitemap`, DROP `showSEO`";
		$executeSQL = mysql_query($querySQL);
		$querySQL = "ALTER TABLE `xyz_Pages` ADD `showMenu` TINYINT NOT NULL DEFAULT '1', ADD `showSitemap` TINYINT NOT NULL DEFAULT '1', ADD `showSEO` TINYINT NOT NULL DEFAULT 1";
		$executeSQL = mysql_query($querySQL);
	}

Open in new window

0
 
LVL 109

Expert Comment

by:Ray Paseur
ID: 22840540
@cr4ck3rj4ck: Just a thought, but when working with beginners, it's a good idea to remind them to test the return values from functions and print out error messages, etc.  Otherwise you get a lot of "it didn't work" postings. ;-)
<?php // multiple db updates
 
// BASIC CONNECTION INFORMATION ASSUMES ALL DB ARE ON SAME SERVER
$db_host	= "localhost";
$db_user	= "your user id";
$db_word	= "your password";
 
// AN ARRAY OF DATA BASE NAMES - YOU MIGHT LOAD THIS BY READING IT FROM A FILE?
$db_names[]	= "db_sdfdsfd1";
$db_names[]	= "db_jhgdj34";
$db_names[]	= "db_xz45g";
 
// CONNECT TO THE DATA BASE SERVER
if (!$db_connection = mysql_connect("$db_host", "$db_user", "$db_word")) {
	$errmsg	= mysql_errno() . ' ' . mysql_error();
	echo "$errmsg";
	die();
}
 
// ITERATE OVER DATA BASE NAME LIST
foreach ($db_names as $db_name) {
 
// SELECT THE DATA BASE
	if (!$db_sel = mysql_select_db($db_name, $db_connection)) {
	 	$errmsg	= mysql_errno() . ' ' . mysql_error();
	 	echo "$errmsg";
	 	die();
	}
	
// EXECUTE THE QUERIES 
	$sql	= "ALTER TABLE `xyz_Pages` DROP `showMenu`, DROP `showSitemap`, DROP `showSEO` ";
	if (!$s	= mysql_query($sql)) { $error = mysql_error(); die("$error"); } 
	/* MORE QUERIES, AS REQUIRED */
}
?>

Open in new window

0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Build an array called $myWeek which will hold the array elements Today, Yesterday and then builds up the rest of the week by the name of the day going back 1 week.   (CODE) (CODE) Then you just need to pass your date to the function. If i…
3 proven steps to speed up Magento powered sites. The article focus is on optimizing time to first byte (TTFB), full page caching and configuring server for optimal performance.
The viewer will learn how to look for a specific file type in a local or remote server directory using PHP.
This tutorial will teach you the core code needed to finalize the addition of a watermark to your image. The viewer will use a small PHP class to learn and create a watermark.

805 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question