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  • Which MySQL Frontend shows foreign rows?

    - by Jeremy Rudd
    I once came across a MySQL Frontend app that displayed foreign linked rows within the parent row, if for instance the Events table has a foreign key to the Students table: Student ID Name DOB -- ---- --------- [+] 22 Bob 25-1-1984 [-] 21 Jane 25-1-1982 Event ID Student-ID Name Time -- ---------- ---- --------- 1 21 Event A 05:50 1 21 Event B 17:20 [+] 20 Jack 25-1-1980

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  • mysql enum performance: is enum slower than INT

    - by JP19
    Hi, Is it better to have a field status enum('active', 'hidden', 'deleted') OR status tinyint(3) with a lookup table. Assume that status can take only one value at a time. In particular, I am interested in knowing, are operations on enum significantly slower than or as fast as operations on int ? There is a related question on SO Mysql: enum confusion but i) It does not discuss performance at all ii) There is very little explanation on WHY one approach is better than the other. regards, JP

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  • mysql utf encoding

    - by user121196
    java.sql.SQLException: Incorrect string value: '\xAC\xED\x00\x05sr...' for column 'xxxx' the column is a longtext in MYSQL with utf8 charset and utf8_general_ci collation. what's wrong?

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  • PHP analog of mysql like function

    - by DCrystal
    Suppose it's a nub question, but is there an analog of mysql's LIKE function in php? So, e.g. : like('goo*','google.com');//is true like('*gl*','google.com');//true like('google.com','google.com')//also true I know regex rullez, but don't know any solution to reach this

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  • mysql count, distinct, join? COnfusion

    - by calum
    hello i have 2 tables: tblItems ID | orderID | productID 1 1 2 2 1 2 3 2 1 4 3 2 tblProducts productID | productName 1 ABC 2 DEF im attempting to find the most popular Product based on whats in "tblItems", and display the product Name and the number of times it appears in the tblItems table. i can get mysql to count up the total like: $sql="SELECT COUNT(productID) AS CountProductID FROM tblItems"; but i can't figure out how to join the products table on..if i try LEFT JOIN the query goes horribly wrong hopefully thats not too confusing..thankss

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  • MySQL Select names with last names ending with certain letter

    - by Brian
    I have a MySQL database with a field Name which contains full names. To select all people with last names ending in a particular letter, let's say A for this example, I use the following query: SELECT * FROM db WHERE Name LIKE '% A%'. However, this also selects users who have a middle name starting with A. Is there anyway to alter this query so that only a last name ending in A will be selected?

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  • MySQL Triggers to Disable A User Account

    - by Mike D
    I am trying to create a MySQL Trigger to disable someone's account if they have logged in to the site 3 times. I have tried to create this trigger using the following code, but it is not setting is_active to 0 no matter what times_logged_in is. Any help would be appreciated. CREATE TRIGGER updateTrigger AFTER UPDATE ON users FOR EACH ROW BEGIN UPDATE users SET is_active=0 WHERE NEW.is_code=1 AND NEW.times_logged_in>=3 AND NEW.user_id=user_id; END;

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  • Mysql::Error: Duplicate entry

    - by Shaliko
    Hi I have a model class Gift < ActiveRecord::Base validates_uniqueness_of :giver_id, :scope => :account_id end add_index(:gifts, [:account_id, :giver_id], :uniq => true) Action def create @gift= Gift.new(params[:gift]) if @gift.save ... else ... end end In the "production" mode, I sometimes get an error ActiveRecord::StatementInvalid: Mysql::Error: Duplicate entry '122394471958-50301499' for key 'index_gifts_on_account_id_and_user_id' What the problem?

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  • Query MySQL with unicode char code.

    - by Ben
    Hi, I have been having trouble searching through a MySQL table, trying to find entries with the character (UTF-16 code 200E) in a particular column. This particular code doesn't have a glyph, so it doesn't seem to work when I try to paste it into my search term. Is there a way to specify characters as their respective code point instead for a query? Thanks, -Ben

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  • Simulating MySQL's ORDER BY FIELD() in Postgresql

    - by Peer Allan
    Hello all, Just trying out Postgresql for the first time, coming from MySQL. In our Rails application we have a couple of locations with SQL like so: SELECT * FROM `currency_codes` ORDER BY FIELD(code, 'GBP', 'EUR', 'BBD', 'AUD', 'CAD', 'USD') DESC, name ASC It didn't take long to discover that this is not supported/allowed in Postgresql. Does anyone know how to simulate this behaviour in Postgres or do we have to pull to sorting out into the code? Thanks Peer

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  • How To Disable Curl Debug Output in PHP

    - by streetparade
    I wrote a PHP CUrl Class, if i execute Methods which should return the Content, it returns at first the Headers and after that the Content. So i cant parse any XML Data. I need to Disable This Sample Output. HTTP/1.1 200 OK Date: Thu, 01 Apr 2010 20:11:58 GMT Server: Apache/2.2.9 (Debian) PHP/5.2.6-1+lenny4 with Suhosin-Patch mod_ssl/2.2.9 OpenSSL/0.9.8g X-Powered-By: PHP/5.2.6-1+lenny4 Set-Cookie: PHPSESSID=44beccf62f87546140d4a0bd24bd28b0; path=/ Expires: Thu, 19 Nov 1981 08:52:00 GMT Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Pragma: no-cache Transfer-Encoding: chunked Content-Type: application/xml Here is The Curl Class <?php class Test_Curl { protected $curl; protected $headers; protected $useragent; protected $url; protected $testkey; public function __construct() { } public function setUseraget($useragent) { $this->useragent = $useragent; return $this; } public function setApiKey($key) { $this->billomatApiKey = $key; } private function curlExecGeneral() { $result = curl_exec($this->curl); curl_close($this->curl); return $result; } private function curlInitGeneral($request) { $this->curl = curl_init($request); curl_setopt($this->curl, CURLOPT_HEADER, true); curl_setopt($this->curl, CURLOPT_HTTPHEADER, array("X-testkey: ".$this->testkey, "Content-Type: application/xml")); curl_setopt($this->curl, CURLOPT_RETURNTRANSFER, true); } public function get($request) { $this->curlInitGeneral($request); curl_setopt ($this->curl, CURLOPT_HTTPGET, true); return $this->curlExecGeneral(); } public function post($request, $xml) { $this->curlInitGeneral($request); curl_setopt ($this->curl, CURLOPT_POST, true); //set the Requestmethod to POST curl_setopt ($this->curl, CURLOPT_POSTFIELDS, $xml); //add the xml data to the Request return $this->curlExecGeneral(); } } ?>

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  • BULK INSERT problem in mysql

    - by kartiku
    Hi, I get an error with the following sql command for bulk insert....any help would be appreciated. BULK INSERT libra.faculty FROM 'd\:faculty.csv' WITH ( FIELDTERMINATOR = ',', ROWTERMINATOR = '\n' ); Here's the error message ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'BULK INSERT libra.faculty FROM 'd:\faculty.csv' WITH ( FIELDTERMINATOR = ',', RO' at line 1

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  • using or in mysql and merging columns

    - by Pradyut Bhattacharya
    I can select using or with the sql statement select f.userid, f.friend_userid from friends f where userid = 1 or friend_userid = 1; now in the output i have to merge the two rows(userid and friend_userid) into one row such that only the rows without 1 are displayed I m using mysql.... Thanks Pradyut India

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  • Importing json data into MySQL?

    - by AP257
    Pretty much what the title says :) At the moment I'm using Python to turn the json data into a plain-text tab-separated file, and then mysqlimport to pull that into my MySQL tables. Anyone know a nicer / more direct way?

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  • Data aggregation mongodb vs mysql

    - by Dimitris Stefanidis
    I am currently researching on a backend to use for a project with demanding data aggregation requirements. The main project requirements are the following. Store millions of records for each user. Users might have more than 1 million entries per year so even with 100 users we are talking about 100 million entries per year. Data aggregation on those entries must be performed on the fly. The users need to be able to filter on the entries by a ton of available filters and then present summaries (totals , averages e.t.c) and graphs on the results. Obviously I cannot precalculate any of the aggregation results because the filter combinations (and thus the result sets) are huge. Users are going to have access on their own data only but it would be nice if anonymous stats could be calculated for all the data. The data is going to be most of the time in batch. e.g the user will upload the data every day and it could like 3000 records. In some later version there could be automated programs that upload every few minutes in smaller batches of 100 items for example. I made a simple test of creating a table with 1 million rows and performing a simple sum of 1 column both in mongodb and in mysql and the performance difference was huge. I do not remember the exact numbers but it was something like mysql = 200ms , mongodb = 20 sec. I have also made the test with couchdb and had much worse results. What seems promising speed wise is cassandra which I was very enthusiastic about when I first discovered it. However the documentation is scarce and I haven't found any solid examples on how to perform sums and other aggregate functions on the data. Is that possible ? As it seems from my test (Maybe I have done something wrong) with the current performance its impossible to use mongodb for such a project although the automated sharding functionality seems like a perfect fit for it. Does anybody have experience with data aggregation in mongodb or have any insights that might be of help for the implementation of the project ? Thanks, Dimitris

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  • What's the largest (most complex) PHP algorithm ever implemented in a single monolithic PHP script?

    - by Alex R
    I'm working on a tool which converts PHP code to Scala. As one of the finishing touches, I'm in need of a really good (er, somewhat biased) benchmark. By dumb luck my first benchmark attempt was with some code which uses bcmath extensively, which unfortunately is 1000x slower in Java, making the Scala code 22x slower overall than the original PHP. So I'm looking for some meaningful PHP benchmark with the following characteristics: The source needs to be in a single file. I need it to be simple to setup - no databases, hard-to-find input files, etc. Simple text input and output preferred. It should not use features that are slow in Java (BigInteger, trigonometric functions, etc). It should not use exoteric or dynamic PHP functions (e.g. no "eval" or "variable vars"). It should not over-rely on built-in libraries, e.g. MD5, crypt, etc. It should not be I/O bound. A CPU-bound memory-hungry algorithm is preferred. Basically, intensive OO operations, integer and string manipulation, recursion, etc would be great. Thanks

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  • Mysqli query only works on localhost, not webserver

    - by whamo
    Hello. I have changed some of my old queries to the Mysqli framework to improve performance. Everything works fine on localhost but when i upload it to the webserver it outputs nothing. After connecting I check for errors and there are none. I also checked the php modules installed and mysqli is enabled. I am certain that it creates a connection to the database as no errors are displayed. (when i changed the database name string it gave the error) There is no output from the query on the webserver, which looks like this: $mysqli = new mysqli("server", "user", "password"); if (mysqli_connect_errno()) { printf("Can't connect Errorcode: %s\n", mysqli_connect_error()); exit; } // Query used $query = "SELECT name FROM users WHERE id = ?"; if ($stmt = $mysqli->prepare("$query")) { // Specify parameters to replace '?' $stmt->bind_param("d", $id); $stmt->execute(); // bind variables to prepared statement $stmt->bind_result($_userName); while ($stmt->fetch()) { echo $_userName; } $stmt-close(); } } //close connection $mysqli-close(); As I said this code works perfectly on my localserver just not online. Checked the error logs and there is nothing so everything points to a good connection. All the tables exists as well etc. Anyone any ideas because this one has me stuck! Also, if i get this working, will all my other queries still work? Or will i need to make them use the mysqli framework as well? Thanks in advance.

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  • PHP - Database schema: version control, branching, migrations.

    - by Billiam
    I'm trying to come up with (or find) a reusable system for database schema versioning in php projects. There are a number of Rails-style migration projects available for php. http://code.google.com/p/mysql-php-migrations/ is a good example. It uses timestamps for migration files, which helps with conflicts between branches. General problem with this kind of system: When development branch A is checked out, and you want to check out branch B instead, B may have new migration files. This is fine, migrating to newer content is straight forward. If branch A has newer migration files, you would need to migrate downwards to the nearest shared patch. If branch A and B have significantly different code bases, you may have to migrate down even further. This may mean: Check out B, determine shared patch number, check out A, migrate downwards to this patch. This must be done from A since the actual applied patches are not available in B. Then, checkout branch B, and migrate to newest B patch. Reverse process again when going from B to A. Proposed system: When migrating upwards, instead of just storing the patch version, serialize the whole patch in database for later use, though I'd probably only need the down() method. When changing branches, compare patches that have been run to patches that are available in the destination branch. Determine nearest shared patch (or oldest difference, maybe) between db table of run patches and patches in destination branch by ID or hash. Could also look for new or missing patches that are buried under a number of shared patches between the two branches. Automatically merge down to the nearest shared patch, using the db table stored down() methods, and then merge up to the branche's latest patch. My question is: Is this system too crazy and/or fraught with consequences to bother developing? My experience with database schema versioning is limited to PHP autopatch, which is an up()-only system requiring filenames with sequential IDs.

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  • radio button to php

    - by Azzyh
    Hello so i have this form: <form action="javascript:DoSCInsert()" method="post"> <textarea onfocus="this.cleared=true;javascript:clearContents(this);" rows="5" cols="40" id="comment" name="comment">...</textarea> Yes: <input type="radio" value="Y" id="SCvoteY" name="vote"></input> No: <input type="radio" id="SCvoteN" value="N" name="vote"> </input> <input type="hidden" name="fID" id="fID" value="<? echo $_GET["id"]; ?>" /> <input onsubmit="if (!this.comment.cleared) clearContent(this.comment); return true;" type="submit" name="Submit" value="Stem!"/> </form> Anyway so i have this javascript also that tranfers the output info to insertSC.php: function DoSCInsert(){ $("#SCres").html("to sek.."); var nocache = '0'; var data = { fID : $("#fID").val(), SCvote : $("#SCvoteY").val(), SCvote : $("#SCvoteN").val(), comment: $("#comment").val(), nocache: nocache }; $.get('insertSC.php', data, onSCInsertComplete); } function onSCInsertComplete(data,textstatus){ $("#SCres").html(data); } and in my insertSC.php i have this: <?php echo $_GET['comment']." - ".$_GET['SCvoteY']; ?> Now i get out comment but no SCvoteY.... this is just a test i made, what i was really making is that you vote Y or N and then it inserts into the vote column Y or N(what you pickd) now i couldnt figure how to do it/something went wrong somewhere and now i cant even get out SCvoteY i just get undefined index What i need help with is what i just mention i want to when you either choose Y or N it should output what you choose. If you didnt choose any (empty isset?) then false.. else echo Y or N(what you picked)

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  • PHP sessions causing Apache to hang indefinitely

    - by Kmaid
    The problem is that every so often a page that writes to a Session will cause apache to hang forever for a particular session. Once this error occurs for one user any further modifications to any session of any user will cause the website to hang for this user. This problem has been my sole focus for days. I have a development VPS running Windows 2003 and default latest version of XAMPP using the standard PHP session handler. The code in question actually runs on two other machines perfectly normally so although my common sense says it’s a web server configuration issue but at this point I am willing to try anything. On further investigation there are no errors in the Apache, PHP or System event log. Resources are abundant and there is no “AJAX shit storm” or more than a couple writes to a session per page. I have also implemented session_write_close() wherever possible to try and help elevate the problem. I have checked the session’s directory which is set to “C:\windows\Temp” and found that once a user enters this hanging phase that the corresponding session file is exclusively locked and the only way to resolve this is to stop Apache and wait a few moments for the files to become unlocked and delete them. I am not wondering if deletion is required. The Sessions themselves only contain 4 bits of information. ShoppingCartID, UserID, UserLevel and Refering URL and are alphanumerical with an occasional slash. My PHP.INI’s session section is configured like this: session.save_handler = files session.save_path = "C:\WINDOWS\Temp" session.use_cookies = 1 session.name = PHPSESSID session.auto_start = 0 session.cookie_lifetime = 0 session.cookie_path = / session.cookie_domain = session.cookie_httponly = session.serialize_handler = php session.gc_probability = 1 session.gc_divisor = 100 session.gc_maxlifetime = 1440 session.bug_compat_42 = 1 session.bug_compat_warn = 1 session.referer_check = session.entropy_length = 0 session.entropy_file = session.cache_limiter = nocache session.cache_expire = 180 session.use_trans_sid = 0 session.hash_function = 0 session.hash_bits_per_character = 4 I have tried everything I can think of and the whole problem is now a blur to me. Any ideas would be appreciated and thanks for your time reading this :)

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  • parse results in MySQL via REGEX

    - by Derek Adair
    Hi, I'm a bit confused on the functionality of the REGEX support for MySQL and I have yet to find a solid example on how to separate a result with REGEX within an sql statement. Example: How could I pull data from a table emails that looks something like... +-------------------------+ |Emails | |-------------------------| |[email protected]| +-------------------------+ and return something through an sql statement that looks like... +------------------------------+ |Username | Domain | TLD | |-----------|------------|-----| |some.email | yourdomain | com | +------------------------------+

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