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• mysql update where some field is max

  - by Syom

  The table videos has the following fields: id | average | name How can i write the query, to update the name of video, which have the max average, or the second by size average!!! i can do that with two queries, by selecting the max(average) from the table, and then update the name, where ite average equal to max or to second value, but i want to do that in one query. i think the query must look like this UPDATE videos SET name = 'something' WHERE average = MAX(average) Any suggestions?

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• index help for a MySQL query using greater-than operator and ORDER BY

  - by Jaymon

  I have a table with at least a couple million rows and a schema of all integers that looks roughly like this: start stop first_user_id second_user_id The rows get pulled using the following queries: SELECT * FROM tbl_name WHERE stop >= M AND first_user_id=N AND second_user_id=N ORDER BY start ASC SELECT * FROM tbl_name WHERE stop >= M AND first_user_id=N ORDER BY start ASC I cannot figure out the best indexes to speed up these queries. The problem seems to be the ORDER BY because when I take that out the queries are fast. I've tried all different types of indexes using the standard index format: ALTER TABLE tbl_name ADD INDEX index_name (index_col_1,index_col_2,...) And none of them seem to speed up the queries. Does anyone have any idea what index would work? Also, should I be trying a different type of index? I can't guarantee the uniqueness of each row so I've avoided UNIQUE indexes. Any guidance/help would be appreciated. Thanks!

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• Can not delete row from MySQL

  - by Drew

  Howdy all, I've got a table, which won't delete a row. Specifically, when I try to delete any row with a GEO_SHAPE_ID over 150000000 it simply does not disappear from the DB. I have tried: SQLyog to erase it. DELETE FROM TABLE WHERE GEO_SHAPE_ID = 150000042 (0 rows affected). UNLOCK TABLES then 2. As far as I am aware, bigint is a valid candidate for auto_increment. Anyone know what could be up? You gotta help us, Doc. We’ve tried nothin’ and we’re all out of ideas! DJS. PS. Here is the table construct and some sample data just for giggles. CREATE TABLE `GEO_SHAPE` ( `GEO_SHAPE_ID` bigint(11) NOT NULL auto_increment, `RADIUS` float default '0', `LATITUDE` float default '0', `LONGITUDE` float default '0', `SHAPE_TYPE` enum('Custom','Region') default NULL, `PARENT_ID` int(11) default NULL, `SHAPE_POLYGON` polygon default NULL, `SHAPE_TITLE` varchar(45) default NULL, `SHAPE_ABBREVIATION` varchar(45) default NULL, PRIMARY KEY (`GEO_SHAPE_ID`) ) ENGINE=MyISAM AUTO_INCREMENT=150000056 DEFAULT CHARSET=latin1 CHECKSUM=1 DELAY_KEY_WRITE=1 ROW_FORMAT=DYNAMIC; SET FOREIGN_KEY_CHECKS = 0; LOCK TABLES `GEO_SHAPE` WRITE; INSERT INTO `GEO_SHAPE` (`GEO_SHAPE_ID`, `RADIUS`, `LATITUDE`, `LONGITUDE`, `SHAPE_TYPE`, `PARENT_ID`, `SHAPE_POLYGON`, `SHAPE_TITLE`, `SHAPE_ABBREVIATION`) VALUES (57, NULL, NULL, NULL, 'Region', 10, NULL, 'Washington', 'WA'); INSERT INTO `GEO_SHAPE` (`GEO_SHAPE_ID`, `RADIUS`, `LATITUDE`, `LONGITUDE`, `SHAPE_TYPE`, `PARENT_ID`, `SHAPE_POLYGON`, `SHAPE_TITLE`, `SHAPE_ABBREVIATION`) VALUES (58, NULL, NULL, NULL, 'Region', 10, NULL, 'West Virginia', 'WV'); INSERT INTO `GEO_SHAPE` (`GEO_SHAPE_ID`, `RADIUS`, `LATITUDE`, `LONGITUDE`, `SHAPE_TYPE`, `PARENT_ID`, `SHAPE_POLYGON`, `SHAPE_TITLE`, `SHAPE_ABBREVIATION`) VALUES (59, NULL, NULL, NULL, 'Region', 10, NULL, 'Wisconsin', 'WI'); INSERT INTO `GEO_SHAPE` (`GEO_SHAPE_ID`, `RADIUS`, `LATITUDE`, `LONGITUDE`, `SHAPE_TYPE`, `PARENT_ID`, `SHAPE_POLYGON`, `SHAPE_TITLE`, `SHAPE_ABBREVIATION`) VALUES (150000042, 10, -33.8833, 151.217, 'Custom', NULL, NULL, 'Sydney%2C%20New%20South%20Wales%20%2810km%20r', NULL); INSERT INTO `GEO_SHAPE` (`GEO_SHAPE_ID`, `RADIUS`, `LATITUDE`, `LONGITUDE`, `SHAPE_TYPE`, `PARENT_ID`, `SHAPE_POLYGON`, `SHAPE_TITLE`, `SHAPE_ABBREVIATION`) VALUES (150000043, 10, -33.8833, 151.167, 'Custom', NULL, NULL, 'Annandale%2C%20New%20South%20Wales%20%2810km%', NULL); INSERT INTO `GEO_SHAPE` (`GEO_SHAPE_ID`, `RADIUS`, `LATITUDE`, `LONGITUDE`, `SHAPE_TYPE`, `PARENT_ID`, `SHAPE_POLYGON`, `SHAPE_TITLE`, `SHAPE_ABBREVIATION`) VALUES (150000048, 10, -27.5, 153.017, 'Custom', NULL, NULL, 'Brisbane%2C%20Queensland%20%2810km%20radius%2', NULL); INSERT INTO `GEO_SHAPE` (`GEO_SHAPE_ID`, `RADIUS`, `LATITUDE`, `LONGITUDE`, `SHAPE_TYPE`, `PARENT_ID`, `SHAPE_POLYGON`, `SHAPE_TITLE`, `SHAPE_ABBREVIATION`) VALUES (150000045, 10, 43.1002, -75.2956, 'Custom', NULL, NULL, 'New%20York%20Mills%2C%20New%20York%20%2810km%', NULL); INSERT INTO `GEO_SHAPE` (`GEO_SHAPE_ID`, `RADIUS`, `LATITUDE`, `LONGITUDE`, `SHAPE_TYPE`, `PARENT_ID`, `SHAPE_POLYGON`, `SHAPE_TITLE`, `SHAPE_ABBREVIATION`) VALUES (150000046, 10, 40.1117, -78.9258, 'Custom', NULL, NULL, 'Region1', NULL); UNLOCK TABLES; SET FOREIGN_KEY_CHECKS = 1;

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• MySQL Error 1452 - Cannot add or update a child row: a foreign key constraint fails

  - by dscher

  I've looked at other people's questions on this topic but can't seem to find where my error is coming from. Any help would be greatly appreciated. I'm including as much as I can think of that might help find the problem: CREATE TABLE stocks ( id INT AUTO_INCREMENT NOT NULL, user_id INT(11) UNSIGNED NOT NULL, ticker VARCHAR(20) NOT NULL, name VARCHAR(20), rating INT(11), position ENUM("strong buy", "buy", "sell", "strong sell", "neutral"), next_look DATE, privacy ENUM("public", "private"), PRIMARY KEY(id), FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE ) ENGINE=InnoDB DEFAULT CHARSET=utf8; CREATE TABLE IF NOT EXISTS `stocks_tags` ( `stock_id` INT NOT NULL, `tag_id` INT NOT NULL, PRIMARY KEY (`stock_id`,`tag_id`), KEY `fk_stock_tag` (`tag_id`), KEY `fk_tag_stock` (`stock_id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; ALTER TABLE `stocks_tags` ADD CONSTRAINT `fk_stock_tag` FOREIGN KEY (`tag_id`) REFERENCES `tags` (`id`) ON DELETE CASCADE ON UPDATE CASCADE, ADD CONSTRAINT `fk_tag_stock` FOREIGN KEY (`stock_id`) REFERENCES `stocks` (`id`) ON DELETE CASCADE ON UPDATE CASCADE; CREATE TABLE tags( id INT AUTO_INCREMENT NOT NULL PRIMARY KEY, tags VARCHAR(30), UNIQUE(tags) ) ENGINE=INNODB DEFAULT CHARSET=utf8; And the error I'm getting: Database_Exception [ 1452 ]: Cannot add or update a child row: a foreign key constraint fails (`ddmachine`.`stocks_tags`, CONSTRAINT `fk_stock_tag` FOREIGN KEY (`tag_id`) REFERENCES `tags` (`id`) ON DELETE CASCADE ON UPDATE CASCADE) [ INSERT INTO `stocks_tags` (`stock_id`, `tag_id`) VALUES (19, 'cash') ] I did see that someone else had a similar problem based on their enum columns but don't think that's it.

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• Read a text file and transfer contents to mysql database

  - by Jack Brown

  I need a php script to read a .txt file. The content of the text file are like this: data.txt 145|Joe Blogs|17/03/1954 986|Jim Smith|12/01/1976 234|Paul Jones|19/07/1923 098|James Smith|12/09/1998 234|Carl Jones|01/01/1925 These would then get stored into a database like this DataID |Name |DOB 234 |Carl Jones|01/01/1925 I would be so grateful if someone could give me script to achieve this.

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• MySQL Database Query Problem

  - by moustafa

  I need your help!!!. I need to query a table in my database that has record of goods sold. I want the query to detect a particular product and also calculate the quantity sold. The product are 300 now, but it would increase in the future. Below is a sample of my DB Table #---------------------------- # Table structure for litorder #---------------------------- CREATE TABLE `litorder` ( `id` int(10) NOT NULL auto_increment, `name` varchar(50) NOT NULL default '', `address` varchar(50) NOT NULL default '', `xdate` date NOT NULL default '0000-00-00', `ref` varchar(20) NOT NULL default '', `code1` varchar(50) NOT NULL default '', `code2` varchar(50) NOT NULL default '', `code3` varchar(50) NOT NULL default '', `code4` varchar(50) NOT NULL default '', `code5` varchar(50) NOT NULL default '', `code6` varchar(50) NOT NULL default '', `code7` varchar(50) NOT NULL default '', `code8` varchar(50) NOT NULL default '', `code9` varchar(50) NOT NULL default '', `code10` varchar(50) NOT NULL default '', `code11` varchar(50) character set latin1 collate latin1_bin NOT NULL default '', `code12` varchar(50) NOT NULL default '', `code13` varchar(50) NOT NULL default '', `code14` varchar(50) NOT NULL default '', `code15` varchar(50) NOT NULL default '', `product1` varchar(100) NOT NULL default '0', `product2` varchar(100) NOT NULL default '0', `product3` varchar(100) NOT NULL default '0', `product4` varchar(100) NOT NULL default '0', `product5` varchar(100) NOT NULL default '0', `product6` varchar(100) NOT NULL default '0', `product7` varchar(100) NOT NULL default '0', `product8` varchar(100) NOT NULL default '0', `product9` varchar(100) NOT NULL default '0', `product10` varchar(100) NOT NULL default '0', `product11` varchar(100) NOT NULL default '0', `product12` varchar(100) NOT NULL default '0', `product13` varchar(100) NOT NULL default '0', `product14` varchar(100) NOT NULL default '0', `product15` varchar(100) NOT NULL default '0', `price1` int(10) NOT NULL default '0', `price2` int(10) NOT NULL default '0', `price3` int(10) NOT NULL default '0', `price4` int(10) NOT NULL default '0', `price5` int(10) NOT NULL default '0', `price6` int(10) NOT NULL default '0', `price7` int(10) NOT NULL default '0', `price8` int(10) NOT NULL default '0', `price9` int(10) NOT NULL default '0', `price10` int(10) NOT NULL default '0', `price11` int(10) NOT NULL default '0', `price12` int(10) NOT NULL default '0', `price13` int(10) NOT NULL default '0', `price14` int(10) NOT NULL default '0', `price15` int(10) NOT NULL default '0', `quantity1` int(10) NOT NULL default '0', `quantity2` int(10) NOT NULL default '0', `quantity3` int(10) NOT NULL default '0', `quantity4` int(10) NOT NULL default '0', `quantity5` int(10) NOT NULL default '0', `quantity6` int(10) NOT NULL default '0', `quantity7` int(10) NOT NULL default '0', `quantity8` int(10) NOT NULL default '0', `quantity9` int(10) NOT NULL default '0', `quantity10` int(10) NOT NULL default '0', `quantity11` int(10) NOT NULL default '0', `quantity12` int(10) NOT NULL default '0', `quantity13` int(10) NOT NULL default '0', `quantity14` int(10) NOT NULL default '0', `quantity15` int(10) NOT NULL default '0', `amount1` int(10) NOT NULL default '0', `amount2` int(10) NOT NULL default '0', `amount3` int(10) NOT NULL default '0', `amount4` int(10) NOT NULL default '0', `amount5` int(10) NOT NULL default '0', `amount6` int(10) NOT NULL default '0', `amount7` int(10) NOT NULL default '0', `amount8` int(10) NOT NULL default '0', `amount9` int(10) NOT NULL default '0', `amount10` int(10) NOT NULL default '0', `amount11` int(10) NOT NULL default '0', `amount12` int(10) NOT NULL default '0', `amount13` int(10) NOT NULL default '0', `amount14` int(10) NOT NULL default '0', `amount15` int(10) NOT NULL default '0', `totalNaira` double(20,0) NOT NULL default '0', `totalDollar` int(20) NOT NULL default '0', PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COMMENT='InnoDB free: 4096 kB; InnoDB free: 4096 kB; InnoDB free: 409'; #---------------------------- # Records for table litorder #---------------------------- insert into litorder values (27, 'Sanyaolu Fisayo', '14 Adegboyega Street Palmgrove Lagos', '2010-05-31', '', 'DL 001', 'DL 002', 'DL 003', '', '', '', '', '', '', '', '', '', '', '', '', 'AILMENT & PREVENTION DVD- ENGLISH', 'AILMENT & PREVENTION DVD- HAUSA', 'BEAUTY CD', '', '', '', '', '', '', '', '', '', '', '', '', 800, 800, 3000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16, 16, 20, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12800, 12800, 60000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, '85600', 563), (28, 'Irenonse Esther', 'Lagos,Nigeria', '2010-06-01', '', 'DL 005', 'DL 008', 'FC 004', '', '', '', '', '', '', '', '', '', '', '', '', 'GET HEALTHY DVD', 'YOUR FUTURE DVD', 'FOREVER FACE CAP (YELLOW)', '', '', '', '', '', '', '', '', '', '', '', '', 1000, 900, 2000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2000, 1800, 6000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, '9800', 64), (29, 'Kalu Lekway', 'Lagos, Nigeria', '2010-06-01', '', 'DL 001', 'DL 003', '', '', '', '', '', '', '', '', '', '', '', '', '', 'AILMENT & PREVENTION DVD- ENGLISH', 'BEAUTY CD', '', '', '', '', '', '', '', '', '', '', '', '', '', 800, 3000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2400, 18000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, '20400', 133), (30, 'Dele', 'Ilupeju', '2010-06-02', '', 'DL 001', 'DL 003', '', '', '', '', '', '', '', '', '', '', '', '', '', 'AILMENT & PREVENTION DVD- ENGLISH', 'BEAUTY CD', '', '', '', '', '', '', '', '', '', '', '', '', '', 800, 3000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8000, 30000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, '38000', 250);

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• mySQL auto increment problem: Duplicate entry '4294967295' for key 1

  - by Josh

  I have a table of emails. The last record in there for an auto increment id is 3780, which is a legit record. Any new record I now insert is being inserted right there. However, in my logs I have the occasional: Query FAIL: INSERT INTO mail.messages (timestamp_queue) VALUES (:time); Array ( [0] => 23000 [1] => 1062 [2] => Duplicate entry '4294967295' for key 1 ) Somehow, the autoincrement jumped up to the INT max of 4294967295 Why on god's green earth would this get jumped up so high? I have no inserts with an id field. The show status for that table, Auto_increment table now reads: 4294967296 How could something like this occur? I realize the id field should perhaps be a big int, but the worry I have is that somehow this thing jumps back up. Josh

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• Connection Reset on MySQL query

  - by sunwukung

  OK, I'm flummoxed. I'm trying to execute a query on a database (locally) and I keep getting a connection reset error. I've been using the method below in a generic DAO class to build a query string and pass to Zend_Db API. public function insert($params) { $loop = false; $keys = $values = ''; foreach($params as $k => $v){ if($loop == true){ $keys .= ','; $values .= ','; } $keys .= $this->db->quoteIdentifier($k); $values .= $this->db->quote($v); $loop = true; } $sql = "INSERT INTO " . $this->table_name . " ($keys) VALUES ($values)"; //formatResult returns an array of info regarding the status and any result sets of the query //I've commented that method call out anyway, so I don't think it's that try { $this->db->query($sql); return $this->formatResult(array( true, 'New record inserted into: '.$this->table_name )); }catch(PDOException $e) { return $this->formatResult($e); } } So far, this has worked fine - the errors have been occurring since we generated new tables to record user input. The insert string looks like this: INSERT INTO tablename(`id`,`title`,`summary`,`description`,`keywords`,`type_id`,`categories`) VALUES ('5539','Sample Title','Sample content',' \'Lorem ipsum dolor sit amet, consectetur adipiscing elit. In et pellentesque mauris. Curabitur hendrerit, leo id ultrices pellentesque, est purus mattis ligula, vitae imperdiet neque ligula bibendum sapien. Curabitur aliquet nisi et odio pharetra tincidunt. Phasellus sed iaculis nisl. Fusce commodo mauris et purus vehicula dictum. Nulla feugiat molestie accumsan. Donec fermentum libero in risus tempus elementum aliquam et magna. Fusce vitae sem metus. Aenean commodo pharetra risus, nec pellentesque augue ullamcorper nec. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Nullam vel elit libero. Vestibulum in turpis nunc.\'','this,is,a,sample,array',1,'category title') You'll probably notice the big chunk of whitespace before the Lorem Ipsum string. The description field is being populated from a TinyMCE textarea - I'm guessing it's chucking in some line returns, so I've tried stripping those out. However, even if I disable the TinyMCE field, the reset error still occurs. The next port of call was checking the limits on the table, since it seems to insert if the length of "description" is around the 300 mark (it varies between 310 - 330). The field limit is set to VARCHAR(1500) and the validation on this field won't allow anything past bigger than 1200 with HTML, 800 without. The real kicker is that if I take this sql string and execute it via the command line, it works fine - so I can't for the life of me figure out what's wrong. So, in a nutshell, I'm stumped. Any ideas?

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• Elgg MySQL: manual user activation?

  - by dde

  How do you manually activate a user? I am stuck. I have a hosted app, but no mail server yet because I am waiting for a domain name to be transferred to a new registrar. Meanwhile, the site is in a preview mode and it works fine, but remember elgg sends an email and requires new users to confirm via email. For now, I just want to manually activate a couple of users (admin, and some other guest).

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• Subsonic 3, MySql, won't update record.

  - by Warspawn

  [WebMethod] public string GetAuthToken(string username, string password) { var db = new LogicDB(); //var results = from u in db.Users // where u.Username == username && u.Password == password // select u; User u = db.Select .From<User>() .Where(UsersTable.UsernameColumn).IsEqualTo(username) .And(UsersTable.PasswordColumn).IsEqualTo(password) .ExecuteSingle<User>(); if (u == null) { return "{'success': false, 'reason': 'Invalid username and/or password.'}"; } else { // really there should only be one match... Guid code = Guid.NewGuid(); u.Securitycode = code.ToString(); u.Securityexp = System.DateTime.Now.AddHours(24); //u.Save(db.Provider); return "{'id':'" + u.Id.ToString() + "', 'code':'" + code.ToString() + "', 'exp':'" + u.Securityexp.ToString() + "'}" + "\n\n<br/><br/>" + u.GetDirtyColumns().ToArray().ToString(); } } When I run that, I keep getting: System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary. This is when u.Save(db.Provider); is uncommented. And happens even with just u.Save(); or using the linq query above results instead.

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• mysql encoding problem

  - by Syom

  i have a proble, when insert something in foreign language into database. i have set the collation of database to utf8_general_ci(try utf8_unicod_ci too). but when i insert some text into table, it was saved like this Õ€Õ¡ÕµÕ¥Ö€Õ¥Õ¶ Ô±Õ¶Õ¸Ö‚Õ¶ but when i read from database, text shows in correct form. it looks like that only in database. i have set encoding in my html document to charset=UTF-8 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> and i set mysql_query("SET NAMES UTF-8"); mysql_query("SET CHARACTER SET UTF-8"); when conecting to database. so i think that i' ve done everything, but it still save in that anknown format. could you help me. thanks in advance

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• What is wrong with my PHP/MySQL code?

  - by James

  I am building a navigation menu which lists all my categories and subcategories. The problem is it returns only one of these and not all. I have the categories echoed inside the while loop so I'm not sure why it's only showing one result and not all: <?php $query = mysql_query("SELECT * FROM categories_parent"); while ($row = mysql_fetch_assoc($query)) { $id = $row['id']; $name = $row['name']; $slug = $row['slug']; $childStatus = $row['child_status']; // if has child categories if ($childStatus == "1") { echo "<li class='dir'><a href='category.php?slug=$slug'>$name</a>"; echo "<ul id='dropdown'>"; $query = mysql_query("SELECT * FROM categories_child WHERE parent=$id"); while ($row = mysql_fetch_assoc($query)) { $id = $row['id']; $name = $row['name']; $slug = $row['slug']; echo "<li><a href='category.php?slug=$slug'>$name</a></li>"; } echo "</ul>"; echo "</li>"; } // if singular parent else { echo "<li><a href='category.php?slug=$slug'>$name</a></li>"; } } ?> My database tables: -- -- Table structure for table `categories_child` -- CREATE TABLE IF NOT EXISTS `categories_child` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` varchar(1000) NOT NULL, `slug` varchar(1000) NOT NULL, `parent` int(11) NOT NULL, PRIMARY KEY (`id`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=139 ; -- -- Dumping data for table `categories_child` -- INSERT INTO `categories_child` (`id`, `name`, `slug`, `parent`) VALUES (138, 'Britney Spears', 'category/celiberties/britney-spears/', 137), (136, 'Tigers', 'category/animals/tigers/', 136), (137, 'Horses', 'category/animals/horses/', 136), (135, 'Lions', 'category/animals/lions/', 136); -- -- Table structure for table `categories_parent` -- CREATE TABLE IF NOT EXISTS `categories_parent` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` varchar(1000) NOT NULL, `slug` varchar(1000) NOT NULL, `child_status` int(1) NOT NULL DEFAULT '0', PRIMARY KEY (`id`) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=139 ; -- -- Dumping data for table `categories_parent` -- INSERT INTO `categories_parent` (`id`, `name`, `slug`, `child_status`) VALUES (137, 'Celiberties', 'category/celiberties/', 1), (138, 'TV Shows', 'category/tv-shows/', 0), (136, 'Animals', 'category/animals/', 1);

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• mysql replace accented characters

  - by pixeline

  Hi, i would like to generate strict alphanumeric character logins from users' first and lastname. Since many of them are foreigners, their names have special characters (é, è, ï, ...). I would like to remove the accents (e,e,i,...) in the logins. Here is my query. Is there a character set that does not contain accents? UPDATE contacts SET login=CONVERT(LOWER(CONCAT(firstname,'.',lastname)) USING utf8);

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• mysql query is producing more results than it should

  - by user253530

  SELECT S.CLIENT,S.IP_DOMAIN as IP, IFNULL(K.DATE, DATE '0000-00-00') AS RecentDate FROM PLD_SERVERS AS S JOIN PLD_SEARCHES AS K ON S.ID = K.SERVER_ID This query will produce as many results as entries in the PLD_SEARCHES. For example: I have 3 entries in PLD_SERVERS and 18 entries in PLD_SEARCHES. The output of this query will be 18 but i need it to be 3 (as the number of PLD_SERVERS entries) with the recent date as a join field from PLD_SEARCHES.

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• Inbox Functionality with MYSQL

  - by Faisal Abid

  So I am writing a simple inbox private message system, my table schema is as follows - messageID - message - sender id - receiver id - date sent - read ( 0 = no , 1 = yes) now I am able to show the messages for the user by relating his userID to receiverID. However I also want to show the messages he has sent in the inbox to the user. For example his inbox should show Darth Vader - 3 New messages Luke - 0 new messages (0 because either I read all of them OR i sent him the message and he has not replied). But what i can only come up with is Darth Vader - 3 New messages. Can I get any help with how I can accomplish this SQL call?

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• Slow select when inserting large amounts of data (MYSQL)

  - by siannopollo

  I have a process that imports a lot of data (950k rows) using inserts that insert 500 rows at a time. The process generally takes about 12 hours, which isn't too bad. Normally doing a query on the table is pretty quick (under 1 second) as I've put (what I think to be) the proper indexes in place. The problem I'm having is trying to run a query when the import process is running. It is making the query take almost 2 minutes! What can I do to make these two things not compete for resources (or whatever)? I've looked into "insert delayed" but not sure I want to change the table to MyISAM. Thanks for any help!

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• Creating a multi-step process with mysql and php

  - by Paul Atkins

  Hi, I am working on a script which allows users to create a stepped process. The steps will consist of sending visitors to urls where they will fill out a form then be directed to the next step the user has created. Each user can create as many steps as they wish and the url for each step will be unique. I am not sure if I am doing this in the correct/most efficient way so I have a few questions about this. Before I begin here is a simple version of my table structure: step_id user_id step_url step_order 1 1 example.com?step=1 1 2 2 test.com?step=1 1 3 1 example.com?step=3 2 A visitor will be directed to step_url: example.com?step=1 by user_id: 1 On this page there will be a form which contains a hidden field with the value of the step_id like this: <input type="hidden" name="step_id" value="1"> Once the visitor has filled out this form it will be processed by my script at a url similar to: http://mysite.com/form-process.php Once the form has been submitted I then need to direct the visitor to the next step my user has created. I would currently do this using code similar to this: SELECT step_url FROM table WHERE step_order='$current_step_order'+1 Here are my questions about this: Is this the best most efficient way to accomplish this? Or is there a better way? As the step_id column is auto increment...how would I increment the order column by 1 each time a user inserts a new step? Thanks for taking the time to read this. Paul

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• mysql max function usage

  - by Simon

  the table videos has the folowing feels id,average,name how can i write the query, to select the name of video, which have the max average!!! i can do that vith two queries, by selecting the max(avege) from the table, and then find out the name, where ihe average equal to max!!! but i want to do that in one query!!! help me please!!!

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• dynamic insert php mysql and preformance

  - by Ross

  I have a folder/array of images, it may be 1, maximum of 12. What I need to do is dynamically add them so the images are added to an images table. At the moment I have $directory = "portfolio_images/$id/Thumbs/"; $images = glob("" . $directory . "*.jpg"); for ( $i= 0; $i <= count($images); $i += 1) { mysql_query("INSERT INTO project_images (image_name, project_id)VALUES ('$images[0]', '$id')") or die(mysql_error()); } this is fine but it does not feel right, how is this for performance? Is there a better way? The maximum number of images is only ever going to be 12. Thanks, Ross

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• Datamining on a mysql database

  - by sliptix

  Hello, I Begin with textmining. I have two database tables with thousands of data.. a table for "skills" and a table for "skills categories" every "skill" belongs to a skills categorie. a "skill" is , physicaly, a varchar(200) field in the database, where there is some text describing the skill. Here are some skills extracted from the skills table: "PHP (good level), Java (intermediaite), C++" "PHP5" "project management and quality management" "begining Javascript" "water engineering" "dfsdf zerze rzer" "cibling customers" what i want to do is to extract knowledge from those fields, i mean extract only the real skill and ignore the rest of useless text. for the above example i want to get only an array with: "PHP" "Java" "C++" "PHP5" "project management" "quality management" "Javascript" "water engineering" "cibling customers" what should i do to extract the skills from tons of data please ? do you know specific algorithms to do this ? ex : k-means ... ? Thanks in advance.

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• mySQL - query to combine two tables

  - by W.Gerick

  Hi there, I have two tables. The first one holds information about cities: Locations: locID | locationID | locationName | countryCode | 1 | 2922239 | Berlin | de | 2 | 291074 | Paris | fr | 3 | 295522 | Orlando | us | 3 | 292345 | Tokyo | jp | There is a second table, which holds alternative names for locations. There might be NO alternative name for a location in the Locations table: AlternateNames: altNameID | locationID | alternateName | 1 | 2922239 | Berlino | 2 | 2922239 | Berlina | 3 | 291074 | Parisa | 4 | 291074 | Pariso | 5 | 295522 | Orlandola | 6 | 295522 | Orlandolo | What I would like to get is the locationID, name and the countryCode of a location for a location name search like "Berlin", or "Ber": | locationID | name | countryCode | | 2922239 | Berlin | de | However, if the user searches for "Berlino", I would like to get the alternateName back: | locationID | name | countryCode | | 2922239 | Berlino | de | The "locationName" has a higher priority than the alternateName, if the searchterm matches both. I can't figure out how to build a query to do that. Since the name can come from one of the two tables, it seems quite difficult to me. Any help is really appreciated!

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• URL regex search and replace on MySQL (in WordPress)

  - by Tal Galili

  Hello all, I have a WordPress blog with numerous URL's I wish to replace from this: http://www.oldwebsite.co.il/name/*.asp To this: http://www.newwebsite.com/?p=* For example, from this: http://oldwebsite.co.il/name/65971.asp To this: http://www.newwebsite.com/?p=65971 I believe the following plugin: http://urbangiraffe.com/plugins/search-regex/ will do the trick with regex, but I am looking for the correct regex to use here. I found this stackoverflow thread that has a similar task, but since I am not too apt with regex, I was hoping for help so I don't mess anything up. Thanks, Tal After searching stackoverflow, I found

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• Trouble with MySQL: CONCAT_WS(' ', name_first, name_middle, name_last) like '%keyword%'

  - by AJB

  hey folks, I'm setting up a keyword search across multiple fields: name_first, name_middle, name_last but I'm not getting the results I'd like. Here's the query: "SELECT accounts_users.user_ID, users.name_first, users.name_middle, users.name_last, users.company FROM accounts_users, users WHERE accounts_users.account_ID = '$account_ID' AND accounts_users.user_ID = users.id AND CONCAT_WS(' ', users.name_first, users.name_middle, users.name_last) LIKE '$user_keyword%' ORDER BY users.name_first ASC" So, if I've got three names in the DB: Aaron J Ban Aaron J Can Bob L Lawblaw And if the user_keyword == "bob lawblaw" I get no result. If user_keyword == "bob L" then it returns Bob L Lawblaw. Obviously I can't force people to include the persons middle name in their keyword search but I'm stuck for the proper way to do this. All help is greatly appreciated.

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• Mysql Sub Select Query Optimization

  - by Matt

  I'm running a query daily to compile stats - but it seems really inefficient. This is the Query: SELECT a.id, tstamp, label_id, (SELECT author_id FROM b WHERE b.tid = a.id ORDER BY b.tstamp DESC LIMIT 1) AS author_id FROM a, b WHERE (status = '2' OR status = '3') AND category != 6 AND a.id = b.tid AND (b.type = 'C' OR b.type = 'R') AND a.tstamp1 BETWEEN {$timestamp_start} AND {$timestamp_end} ORDER BY b.tstamp DESC LIMIT 500 This query seems to run really slow. Apologies for the crap naming - I've been asked to not reveal the actual table names. The reason there is a sub select is because the outer select gets one row from the table a and it gets a row from table b. But also need to know the latest author_id from table b as well, so I run a subselect to return that one. I don't want to run another select inside a php loop - as that is also inefficient. It works correctly - I just need to find a much faster way of getting this data set.

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• Mysql PHP generated table: doesn't work with Tablesorter

  - by echedey lorenzo

  Hi, I found this great Tablesorter plugin for jQuery but I can't make it work with my PHP generated table. Here's the code: <script type="text/javascript"> function table() { $("#container").load("table.php?randval="+Math.random()); } $(document).ready(function() { table(); $("table").tablesorter(); }); </script> Where #container is the div where the table will be and table is the name of the table. I get the table loaded but sorting function is not working. It works if I put the table directly in html in the page.. but I don't see the point in having a static table for sorting. Any help would be very appreciated.

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