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• Recent Ubuntu update prevents MySQL root access

  - by Rhys

  I recently updated my Ubuntu (10.04 LTS) server (apt-get update, apt-get upgrade), and everything works fine, apart from the root access to my MySQL database. phpMyAdmin, CakePHP, and essentially all connections return similar access errors. For example, PMA returns 'Connection for controluser as defined in your configuration failed.' I have tried to find similar examples of this instance, but cannot find assistance in what configuration I should be changing to restore root log in access. The same issue has occurred on two servers. One has additional users so I could get around it, but the other is a new development server with only root MySQL access, so I am stuck on how to resolve this.

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• how execute mysql command DELIMITER

  - by user5332

  hi, I have huge problem (for me) I need from PHP execute mysql command DELIMITER | but mysql_query fails on error... and I found that mysql_query doesn't support usage of DELIMITER, because this command may be working only in mysql console but when I open phpMyAdmin ... is there at SQL tab an option to change DELIMITER and it works... but I don't know how... could you help me? who is possile to change delimiter from PHP? I need it to do before CREATE TRIGGER ... that uses several ; that may not be interpreted like command end

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• Mysql not starting - innodb not found

  - by Rob Guderian

  I have a fresh install of ubuntu 12.04 server edition and mysql server is not starting properly. I did a simple apt-get install apt-get install mysql-server But, it's failing with this error message root@test:~# mysqld 120618 20:57:32 [Warning] The syntax '--log-slow-queries' is deprecated and will be removed in a future release. Please use '--slow-query-log'/'--slow-query-log-file' instead. 120618 20:57:32 [Note] Plugin 'FEDERATED' is disabled. 120618 20:57:32 InnoDB: The InnoDB memory heap is disabled 120618 20:57:32 InnoDB: Mutexes and rw_locks use GCC atomic builtins 120618 20:57:32 InnoDB: Compressed tables use zlib 1.2.3.4 120618 20:57:32 InnoDB: Unrecognized value fdatasync for innodb_flush_method 120618 20:57:32 [ERROR] Plugin 'InnoDB' init function returned error. 120618 20:57:32 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 120618 20:57:32 [ERROR] Unknown/unsupported storage engine: InnoDB 120618 20:57:32 [ERROR] Aborting I can start the server with the "--skip-innodb --default-storage-engine=myisam" flags, but would like to use innodb. Does anyone know what the issue here is?

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• MySQL Workbench 5.2.39 GA Released

  - by user13164789

  The MySQL Developer Tools team is announcing the next maintenance release of its flagship product, MySQL Workbench, version 5.2.39. This version contains MySQL Utilities 1.0.5, a set of command line Python utilities for helping to perform and script various administration tasks for MySQL. A complete list of changes in this release of the Utilities can be found at:http://dev.mysql.com/doc/workbench/en/wb-utils-news-1-0-5.html MySQL Workbench 5.2 GA • Data Modeling • Query (replaces the old MySQL Query Browser) • Administration (replaces the old MySQL Administrator) Please get your copy from our Download site. Sources and binary packages are available for several platforms, including Windows, Mac OS X and Linux. http://dev.mysql.com/downloads/workbench/ Workbench Documentation can be found here. http://dev.mysql.com/doc/workbench/en/index.html Utilities Documentation can be found here.http://dev.mysql.com/doc/workbench/en/mysql-utilities.html In addition to the new Query/SQL Development and Administration modules, version 5.2 features improved stability and performance – especially in Windows, where OpenGL support has been enhanced and the UI was optimized to offer better responsiveness. This release also includes improvements to the scripting capabilities of the SQL Editor. You can read more about it in http://wb.mysql.com/workbench/doc/ For a detailed list of resolved issues, see the change log. http://dev.mysql.com/doc/workbench/en/wb-change-history.html If you need any additional info or help please get in touch with us. Post in our forums or leave comments on our blog pages. - The MySQL Workbench Team

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• /dev/sda1 100% Mysql to blame?

  - by SJP

  I have a an API running that receives raw binaries, processes them, and then stores metadata about the bins in a mysql database. I have been running it for a couple days on a VM. Today the API stopped processing the mySQL commands. After using the command df-h the results were: root@mwdb1:/# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 104G 99G 0 100% / udev 16G 4.0K 16G 1% /dev tmpfs 6.3G 364K 6.3G 1% /run none 5.0M 0 5.0M 0% /run/lock none 16G 0 16G 0% /run/shm /dev/sdb1 5.5T 42G 5.2T 1% /data sda1 is at 100%

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• Hosting a Small PHP/MySQL Project [closed]

  - by paulrehkugler

  I have a small PHP/MySQL project in the works and I'm looking for somewhere to host it. My criteria are: Ability to run PHP/MySQL (either natively, or contains the ability to install). Ability to manipulate the web server, so I can make pretty URLs. Not spammy (if you've ever looked for hosting, you know what I mean). Semi-professional - no ridiculous downtime or long response time. I obviously don't need anything spectacular (I'm not aiming to be the next Facebook) but something that doesn't seem cheap. Reasonably priced - obviously this is a side project for fun so I'm not planning on making or dispensing any sort of "serious" revenue.

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• mysql database cannot connect with cpanel [closed]

  - by Rafee

  And this question was asked on http://stackoverflow.com/questions/8182119/mysql-database-cannot-connect-with-cpanel <?php $con1 = mysql_connect("mywebsiteip","mysql_username","mysql_user_password"); if(!$con1) { die ("Could not connect " . mysql_error()); } else { echo "Good connection"; } mysql_close($con1); ?> When i run it, it cannot connect to mysql database over cpanel. and i even tried up $con1 = mysql_connect("mywebsiteip:portnumber","mysql_username","mysql_user_password"); Can any let me know, which one is good way.

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• MySQL with mutiple threads and processes

  - by Abhan

  I'm developing a telecom messaging platform in C, and I'm going to need multiple processes to be working with MySQL DB. How can I make two processes read/write to/from a Mysql DB and, if/when one of them goes down, get the other to seamlessly take over the work until the dead process gets back to work? I was thinking/googling some options and am stuck in place where I don't know which one to choose. What I think so far is that table lock is not the best option to go for, as it will stall the other process until the table is unlocked. The other option is to use row-level locks or manual locks, but I can't find the best way to do it.

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• MySQL prevents server from booting unless password is entered

  - by ZaneKullman

  I am kind of new with Ubuntu but I have been working on setting up a LAMP server with hamachi as a vpn client for management. The issue is that when we turn the server on or restart it we are required to enter the MySQL password before it will continue. Where can we script a password or disable this? I have attached a partial of less /var/log/boot.log * Starting MySQL ServerESC[204G[ OK ] ....... ok Password: If I haven't provided enough information please just comment and Ill try my best.

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• MySql - Get row number on select

  - by George

  Can I run a select statement and get the row number if the items are sorted? I have a table like this: mysql> describe orders; +-------------+---------------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-------------+---------------------+------+-----+---------+----------------+ | orderID | bigint(20) unsigned | NO | PRI | NULL | auto_increment | | itemID | bigint(20) unsigned | NO | | NULL | | +-------------+---------------------+------+-----+---------+----------------+ I can then run this query to get the number of orders by ID: SELECT itemID, COUNT(*) as ordercount FROM orders GROUP BY itemID ORDER BY ordercount DESC; This gives me a count of each itemID in the table like this: +--------+------------+ | itemID | ordercount | +--------+------------+ | 388 | 3 | | 234 | 2 | | 3432 | 1 | | 693 | 1 | | 3459 | 1 | +--------+------------+ I want to get the row number as well, so I could tell that itemID 388 is the first row, 234 is second, etc (essentially the ranking of the orders, not just a raw count). I know I can do this in java when I get the result set back, but I was wondering if there was a way to handle it purely in SQL.

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• Synchronize model in MySQL Workbench

  - by Álvaro G. Vicario

  After reading the documentation for MySQL Workbench I got the impression that it's possible to alter a database in the server (e.g. add a new column) and later incorporate the DDL changes into your EER diagram. At least, it has a Synchronize Model option in the Database menu. I found it a nice feature because I could use a graphic modelling tool without becoming its prisoner. In practice, when I run such tool I'm offered these options: Model Update Source ================ ====== ====== my_database_name --> ! N/A my_table_name --> ! N/A N/A --> ! my_database_name N/A --> ! my_table_name I can't really understand it, but leaving it as is I basically get: DROP SCHEMA my_database_name CREATE SCHEMA my_database_name CREATE TABLE my_table_name This is dump of the model that overwrites all remote changes in my_table_name. Am I misunderstanding the feature?

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• how to delete duplicates in mysql using case

  - by JPro

  Right now I am using something like this to delete duplicates in mysql table : delete t2 from my_table1 as t1, my_table1 as t2 where t1.TestCase = t2.TestCase and t2.id > t1.id; say I have a structure like this : ID TestCAse Result 1 T1 PASS 2 T2 FAIL 3 T3 FAIL 4 T3 PASS now, in the above case T3 is duplicate entry, and if I use the SQL that I mentioned above, it would delete 4th row where the result is PASS, but this is the row that I want to keep and I want row 3 to get deleted which is FAIL. Any help please? Thank you.

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• Can MySQL Nested Select return list of results

  - by John

  Hi I want to write a mysql statement which will return a list of results from one table along with a comma separated list of field from another table. I think an example might better explain it Table 1 ======================== id First_Name Surname ---------------------- 1 Joe Bloggs 2 Mike Smith 3 Jane Doe Table 2 ======================== id Person_Id Job_id --------------------- 1 1 1 2 1 2 3 2 2 4 3 3 5 3 4 I want to return a list of people with a comma separated list of job_ids. So my result set would be id First_Name Surname job_id ------------------------------ 1 Joe Bloggs 1,2 2 Mike Smith 2 3 Jane Doe 3,4 I guess the sql would be something like select id, First_Name, Surname, (SELECT job_id FROM Table 2) as job_id from Table 1 but obviously this does not work so need to change the '(SELECT job_id FROM Table 2) as job_id' part. Hope this makes sense Thanks John

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• Indexing only one MySQL column value

  - by BrainCore

  I have a MySQL InnoDB table with a status column. The status can be 'done' or 'processing'. As the table grows, at most .1% of the status values will be 'processing,' whereas the other 99.9% of the values will be 'done.' This seems like a great candidate for an index due to the high selectivity for 'processing' (though not for 'done'). Is it possible to create an index for the status column that only indexes the value 'processing'? I do not want the index to waste an enormous amount of space indexing 'done.'

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• mysql select from a table depending on in which table the data is in

  - by user253530

  I have 3 tables holding products for a restaurant. Products that reside in the bar, food and ingredients. I use php and mysql. I have another table that holds information about the orders that have been made so far. There are 2 fields, the most important ones, that hold information about the id of the product and the type (from the bar, from the kitchen or from the ingredients). I was thinking to write the sql query like below to use either the table for bar products, kitchen or ingredients but it doesn't work. Basically the second table on join must be either "bar", "produse" or "stoc". SELECT K.nume, COUNT(K.cantitate) as cantitate, SUM(K.pret) as pret, P.nume as NumeProduse FROM `clienti_fideli` as K JOIN if(P.tip,bar,produse) AS P ON K.produs = P.id_prod WHERE K.masa=18 and K.nume LIKE 'livrari-la-domiciliu' GROUP BY NumeProduse

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• [MYSQL] Select users who own both a dog and a cat

  - by matte

  Hi, I have this sample table: CREATE TABLE `dummy` ( `id` int(11) NOT NULL AUTO_INCREMENT, `userId` int(11) NOT NULL, `pet` varchar(50) NOT NULL, PRIMARY KEY (`id`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=7 ; INSERT INTO `dummy` (`id`, `userId`, `pet`) VALUES(1, 1, 'dog'); INSERT INTO `dummy` (`id`, `userId`, `pet`) VALUES(2, 1, 'cat'); INSERT INTO `dummy` (`id`, `userId`, `pet`) VALUES(3, 2, 'dog'); INSERT INTO `dummy` (`id`, `userId`, `pet`) VALUES(4, 2, 'cat'); INSERT INTO `dummy` (`id`, `userId`, `pet`) VALUES(5, 3, 'cat'); INSERT INTO `dummy` (`id`, `userId`, `pet`) VALUES(6, 4, 'dog'); How can I write the statements below in mysql: Retrieve all users who own both a dog and a cat Retrieve all users who own a dog or a cat Retrieve all users who own only a cat Retrieve all users who doesn't own a cat Thanks!

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• MySQL Need help constructing query: join multiple tables into single row

  - by Jed Daniels

  Hello stackoverflowers, Forgive me if this question has been asked and answered, I've searched and found a few that look similar but I'm too much of a novice with SQL to adapt them to my needs. Also forgive me if I don't use the correct terminology, I know it can be annoying when someone asks a question and they don't even know enough to be able to ask for what they need. I'm helping a friend gather some data, and need to perform a query that results in a single row per record, but instead I get multiple rows. Here is an example of what I'm querying right now (simplified, hopefully not too much): SELECT * FROM `table_one` AS t1 INNER JOIN `table_two` AS t2 ON t1.id = t2.id INNER JOIN `table_three` AS t3 ON t1.id = t3.id WHERE 1 The result is: id text number 5 Subtotal 17 5 Tax 3 5 Total 20 What I need is to create a query that results in something more like this: id text number text number text number 5 subtotal 17 Tax 3 Total 20 Any assistance/guidance would be much appreciated. Thanks! --jed

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• using check contraint in MySQL for controlling string length not working

  - by ptrn

  Dear stackoverflow, I'm tumbled with a problem! I've set up my first check constraint using MySQL, but unfortunately I'm having a problem. When inserting a row that should fail the test, the row is inserted anyway. The structure: CREATE TABLE user ( id INT UNSIGNED NOT NULL AUTO_INCREMENT, uname VARCHAR(10) NOT NULL, fname VARCHAR(50) NOT NULL, lname VARCHAR(50) NOT NULL, mail VARCHAR(50) NOT NULL, PRIMARY KEY (id), CHECK (LENGTH(fname) > 3) ); The insert statement: INSERT INTO user VALUES (null, 'user', 'Fname', 'Lname', '[email protected]'); I'm pretty sure I'm missing something basic here.

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• MYSQL: Error: Cannot add or update a child row: a foreign key constraint fails

  - by DalivDali

  Hi all, Using MySQL on Windows OS, and am getting an error upon attempting to create a foreign key between two tables: CREATE TABLE tf_traffic_stats ( domain_name char(100) NOT NULL, session_count int(11) NULL, search_count int(11) NULL, click_count int(11) NULL, revenue float NULL, rpm float NULL, cpc float NULL, traffic_date date NOT NULL DEFAULT '0000-00-00', PRIMARY KEY(domain_name,traffic_date)) and CREATE TABLE td_domain_name ( domain_id int(10) UNSIGNED AUTO_INCREMENT NOT NULL, domain_name char(100) NOT NULL, update_date date NOT NULL, PRIMARY KEY(domain_id)) The following statement gives me the error present in the subject line (cannot add or update a child row: a foreign key constraint fails): ALTER TABLE td_domain_name ADD CONSTRAINT FK_domain_name FOREIGN KEY(domain_name) REFERENCES tf_traffic_stats(domain_name) ON DELETE RESTRICT ON UPDATE RESTRICT Can someone point me in the right direction of what may be causing the error. I also have a foreign key referencing td_domain_name.domain_id, but I don't think this should be interfering... Appreciate it!

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• MySQL - Sort on a calculated value based on two dates

  - by Petter Magnusson

  I have the following problem that needs to be solved in a MySQL query: Fields info - textfield date1 - a date field date2 - a date field offset1 - a text field with a number in the first two positions, example "10-High" offset2 - a text field with a number in the first two positions, example "10-High" I need to sort the records by the calculated "sortvalue" based on the current date (today): If today=date2 then sortvalue=offset1*10+offset2*5+1000 else sortvalue=offset1*10+offset2*5 I have quite good understanding of basic SQL with joins etc, but this I am not even sure if its possible...if it helps I could perhaps live with a single formula giving the same sort of effect as the IFs do....ie. before date1 = low value, after date2 = high value... Rgds PM

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• Searching a table MySQL & PHP.

  - by S1syphus

  I want to be able to search through a MySQL table using values from a search string, from the url and display the results as an XML output. I think I have got the formatting and declaring the variables from the search string down. The issue I have is searching the entire table, I've looked over SO for previous answers, and they all seem to have to declare each column in the table to search through. So for example my database layout is as follows: **filesindex** -filename -creation -length -wall -playlocation First of all would the following be appropriate: $query = "SELECT * FROM filesindex WHERE filename LIKE '".$searchterm."%' UNION SELECT * FROM filesindex WHERE creation LIKE '".$searchterm."%' UNION SELECT * FROM filesindex WHERE length LIKE '".$searchterm."%' UNION SELECT * FROM filesindex WHERE wall LIKE '".$searchterm."%' UNION SELECT * FROM filesindex WHERE location LIKE '".$searchterm."%'"; Or ideally, is there an easier way that involves less hardcoding to search a table. Any ideas? Thanks

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• MySQL: Insert row on table2 if row in table1 exists

  - by Andrew M

  I'm trying to set up a MySQL query that will insert a row into table2 if a row in table1 exist already, otherwise it will just insert the row into table1. I need to find a way to adapt the following query into inserting a row into table2 with the existing row's id. INSERT INTO table1 (host, path) VALUES ('youtube.com', '/watch') IF NOT EXISTS ( SELECT * FROM table1 WHERE host='youtube.com' AND path='/watch' LIMIT 1); Something kind of like this: INSERT ... IF NOT EXISTS(..) ELSE INSERT INTO table2 (table1_id) VALUES(row.id); Except I don't know the syntax for this.

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• Reversing column values in mysql command line

  - by user94154

  I have a table posts with the column published, which is either 0 (unpublished) or 1 (published). Say I want to make all the published posts into unpublished posts and all the unpublished posts into published posts. I know that running UPDATE posts SET published = 1 WHERE published = 0; UPDATE posts SET published = 0 WHERE published = 1; will end up turning all my posts into published posts. How can I run these queries in the mysql command line so that it truly "reverse" the values, as opposed to the mistake outlined above? Thanks

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• insert array to mysql db function

  - by ganjan

  Hi. I have an array where the keys represent each column in my database. Now I want a function that makes a mysql update query. Something like $db['money'] = $money_input + $money_db; $db['location'] = $location $query = 'UPDATE tbl_user SET '; for($x = 0; $x < count($db); $x++ ){ $query .= $db something ".=." $db something } $query .= "WHERE username=".$username." ";

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• MySQL script to delete data in chunks until everything lower then id has been deleted

  - by Chriswede

  I need an MySQL Skript which does the following: delete chunks of the database until it has deleted all link_id's greater then 10000 exmaple: x = 10000 DELETE FROM pligg_links WHERE link_id > x and link_id < x+10000 x = x + 10000 ... So it would delete DELETE FROM pligg_links WHERE link_id > 10000 and link_id < 20000 then DELETE FROM pligg_links WHERE link_id > 20000 and link_id < 30000 until all id's less then 10000 have been removed I need this because the database is very very big (more then a gig) thank in advance

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