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• How to simulate "MYSQL has gone away" error?

  - by Lost_in_code

  I'm running lots of cron job and once in a while there is a MYSQL has gone away error. I've now written some code to handle the error, but how do I simulate the error on my localhost so that the code can be tested thoroughly?

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• Sort MySQL result set using comparison between 2 columns of same value type

  - by Kyobul

  Hello, I have a table containing last_updated_1 and last_updated_2 columns, used respectively for text and images update time on a post. I wish I could get a result set of 10 rows based on all time last updated records contained in the 2 columns, ex. row 1 = last_updated_1 record, row 2 = last_updated_2 record, row 3 = last_updated_1 record, etc. How could I compare inside a MySQL query the both columns values, to get unique & mixed result set ? Thank you in advance for your help

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• How do I prevent sql injection with php and mysql

  - by herrturtur

  I have a form into which the visitor can enter data, and I want to store this data in a mysql database via the $_POST variable. What do I need to prevent sql injection?

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• Checking if mysql user exists

  - by sergiogx

  How can I check if a user exists? Im doing an installer for a mysql database, and I need to check if a user exits, if not create user, if yes delete user and create it again. this so i can execute the script without worries. thanks.

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• store Current Date & time in MySql Using ASP.net

  - by Khilen

  I want to store the current date & time which can be get by System.DateTime.Now in asp.net but while storing in Mysql it gives Error of Invalid Time.

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• Accessing Mysql with JQuery without using php

  - by user326175

  Hi, I'm very new to JQuery, but I was told the one of the cool things about it is you can query a mysql database right from an html page(or in my case a smarty template)with out needing php. I have not found any examples of this so I am asking if someone has one? Thanks

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• Mysql Trigger to select and delete

  - by Karthick

  Hi, Is this possible, can a trigger in mysql can do a select first and then based on its result do a delete?, both on the same table. Am struggling to get it right. There are duplicate entries in a table, i need to have a trigger which selects and then deletes. Any ideas or thoughts will be really helpful.

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• query mysql table and fetch rows posted in 3 days

  - by Mac Taylor

  Hey guys how can i query my mysql database and fetch rows which are posted in earlier 3 days i know how to fetch todays's rows but not 3 days ago time will save in my table like this : 2010-01-20 19:17:49 and this is what i know : SELECT id FROM pages WHERE date=now() but i need to show posts in 3days and im looking for a simple and straight solution ,because i know how to do so in long php codes

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• translate a mysql query into nhibernate

  - by lina

  Good day! Please, can you help me to translate such a mysql query into nhibernate SELECT sales_id, service_id,dayofyear(dt), max(dt) FROM clients.statistics group by sales_id, service_id,dayofyear(dt);

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• MySQL: how to index an "OR" clause

  - by JoséMi

  I'm executing the following query SELECT COUNT(*) FROM table WHERE field1='value' AND (field2 = 1000 OR field3 = 2000) There is one index over field1 and another composited over field2&field3. I see MySQL always selects the field1 index and then makes a join using the other two fields which is quite bad because it needs to join 146.000 rows. Suggestions on how to improve this? Thanks

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• migrate a portion of a mysql table to SQLite

  - by daniel

  I have a mysql table set up like so: user_id | document 44 [blob] 44 [blob] 44 [blob] 46 [blob] I'd like to export all of user_id 44's data to an SQLite3 file. Best way to go about this without writing a script that reads the data and dumps it into a SQLite file?

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• Mysql Windows "mysqldump -t" restore

  - by Glide

  Yes it's Windows sorry. I'm using mysqldump with the option -T which creates a sql and a txt file per table. mysqldump -u user -ppass db -T path I use that option to be able to restore easily one table. Now I'd like to restore all the tables. mysql -u user -ppass db < path/*.sql Obvously doesn't work Also, I don't know where do my funcs/procs go. Thx

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• Last results submitted in mysql db

  - by Tapha

  How would i get the last 20 results submitted in a mysql db row. I need the 20 most recent user submitted results. Cheers.

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• How to validate a single checkbox using PHP & MySQL

  - by BeepU

  I was wondering how can I validate a single checkbox using PHP and MySQL. Here is the HTML. <input type="checkbox" name="privacy_policy" id="privacy_policy" value="yes" />

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• MySQL - What is the correct primary key method

  - by Hammerstein

  I'm starting to develop an application using MySQL and although I've developed apps before using databases, I've normally gone to the incrementing id method. The other day I was reading a posting somewhere and saw someone being picked apart for this, for not properly "normalising the database". I'm not a big database person, but I wanted to make sure I'm doing this right. Any ideas, help / guidance?

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• Convert a mysql date (datetime) into a better date format using php

  - by dave e

  I some php code which gets info from a mysql database. The problem is that the date is coming out in the format : 2010-02-03 22:21:26 Does anyone know a simple solution to make the date more user friendly format. e.g 2nd march 2010 at 22:21. Thanks

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• MySQL: SUM in WHERE clause

  - by checcco

  Hi guys, I've got this table CREATE TABLE `subevents` ( `id` int(11) NOT NULL AUTO_INCREMENT, `title` varchar(150) DEFAULT NULL, `content` text, `class` tinyint(4) NOT NULL DEFAULT '1', PRIMARY KEY (`id`) ) ENGINE=MyISAM Each row can have a different value in the 'class' field. I'd like to select any number of rows, ordered randomly, as long as the sum of the values in the 'class' field is equal to 100. How could I accomplish it directly in the MySQL query without doing it later in PHP? Thanks everybody!

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• MySQL One to Many order by number found in joined table

  - by Finbarr

  Two tables: table_a ------- table_a_id: (primary, int) table_b ------- table_a_id: (index, int, from table_a) table_b_value: (varchar) A one to many relationship between table_a_id and table_b_value. Given a query like this: SELECT DISTINCT(table_a_id) FROM table_a JOIN table_b ON table_a.table_a_id=table_b.table_a_id I want to order by the number of occurrences of table_a_id in table_b. I'm not really sure how to write this in MySQL.

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• Best way to fetch last 4 rows from a result set using mysql

  - by PHP-Prabhu

  Can any one please let me know, that, i need to fetch last 4 rows from a result-set using mysql. The result-set returns totally 6 records. but, i need the records to be fetch from last4...i.e, Record-3 Record-4 Record-5 Record-6

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• MySQL Module for Python

  - by Yakattak

  What is a good, and easy to install MySQL module for Python? Especially for Mac OS X (in terms of installation)?

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• Insert or update when product is present using mysql

  - by Aryan

  main_product table productid outward shopid 333 2 44//present 343 4 44//present 353 5 44//present 363 1 44//present 373 2 44//not present min_product table productid outward shopid 333 1 44 343 1 44 353 1 44 363 1 44 SELECT DISTINCT (A.productid),A.outward, B.productid,B.outward FROM main_product A INNER JOIN min_product B on B.productid=A.product_id where A.shopid='44' and B.shopid='44' my question how can i INSERT OR UPDATE in one query using mysql by checking if it is present or not if present update else insert something like this? INSERT INTO mytable (key, value) VALUES ($newkey, $newvalue) ON DUPLICATE KEY UPDATE SET value = $newvalue

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• How to display categories correctly using php & mySQL?

  - by SAD

  Lets say I'm starting a site that users can enter content but all my categories are empty except one or two, how should the empty categories be displayed to my users if at all using MySQL & PHP?

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• Error #1064 in mySQL Query

  - by William

  I get the following error in the query below: #1064 - 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 ')))' at line 1 Code Snippet: INSERT INTO test_bans( ip, Expiration ) VALUES ( "0.0.0.0", DateAdd( "d", 1, Date( ) ) ) Table creation query CREATE TABLE test_bans ( ID smallint(6) NOT NULL AUTO_INCREMENT, IP text NOT NULL, Expiration DATETIME NOT NULL, PRIMARY KEY (ID) ) TYPE=MyISAM; What am I missing?

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• What happens if MySQL database wasn't closed?

  - by mathew

  What happens if MySQL database is not closed? How do we know if it is closed properly?

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• I'm looking for a introduction to php(5 or 6)/mysql/javascript web development book

  - by prgrmnGuru

  Basically I want the books to be text book based, ie, author discusses the background,philosophy,syntax,semtantix for every language AND after every section there are questions what you learned so far and mini projects. Is there any books like this, I'm absolutely new to php/mysql/javascript and web development in general. Thanks in advance.

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