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• Calculating Percentile Using Cumulative Data in MySQL

  - by Kirk

  What should the percentile ranks be for each of these records and is there a MySQL query I can run to calculate the percentile? id score cumulative_score percentile 1 100 100 ? 2 50 150 ? 3 25 175 ? 4 25 200 ? 5 10 210 …

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• Searching phpbb's 'topic_title' via MYSQL php, but exact match doesn't work

  - by Mint

  $sql = sprintf("SELECT topic_title FROM `phpbb_topics` WHERE `topic_title` LIKE '%%%s%%' LIMIT 20", mysql_real_escape_string('match this title')); Which I run this query in phpMyAdmin the results are: (correct) match this title match this title 002 But when I run that same MYSQL query in PHP I get: (incorrect) match this title 002 I have…

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• Relay Access Denied (State 13) Postfix + Dovecot + Mysql

  - by Pierre Jeptha

  So we have been scratching our heads for quite some time over this relay issue that has presented itself since we re-built our mail-server after a failed Webmin update. We are running Debian Karmic with postfix 2.6.5 and Dovecot 1.1.11, sourcing from a Mysql database and authenticating with SASL2 and PAM. Here are the symptoms of our problem: …

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• Update last child id in parent table using mysql

  - by Sam Saffron

  Given the following tables: Topic id, last_updated_child_id Response id, topic_id, updated_at How do I update the Topic table so the last_updated_child_id is equal to the latest response id (based on date). So for example given: Topic id last_updated_child_id -- ----------------------- 1 null 2 null 3 null Response id …

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• MySQL escape string help

  - by gAMBOOKa

  I have a pretty large insert statement something like INSERT INTO multimedia (filename, regex, flag) VALUES (('adsfavr.jpg', '<div id="title">', 0), (...), (...)); How do I prepare the query for MySQL.It's too long to do it manually. It includes double quotes so I can't use the php function mysql_real_escape_string()

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• Select random row from MySQL (with probability)

  - by James Simpson

  I have a MySQL table that has a row called cur_odds which is a percent number with the percent probability that that row will get selected. How do I make a query that will actually select the rows in approximately that frequency when you run through 100 queries for example? I tried the following, but a row that has a probability of 0.35 ends…

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• mysql real escape string error

  - by user547995

  Code mysql_query("INSERT INTO Account(User, Pw, email) VALUES('mysql_real_escape_string($_POST[user])', '$pw','mysql_real_escape_string($_POST[email]) ) ") or die(mysql_error()); Error: 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 …

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• Create a Cumulative Sum Column in MySQL

  - by Kirk

  I have a table that looks like this: id count 1 100 2 50 3 10 I want to add a new column called cumulative_sum, so the table would look like this: id count cumulative_sum 1 100 100 2 50 150 3 10 160 Is there a MySQL update statement that can do this easily? What's the best way to accomplish this?

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• Advice on how to complete specific MySQL JOIN

  - by Tim

  Hello, I have a mysql table jobs. This is the basic structure of jobs. id booked_user_id assigned_user_id I then also have another table, meta. Meta has the structure: id user_id first_name last_name How can I join these tables so that both booked_user_id and assigned_user_id can access meta.first_name? Thanks for your advice Tim

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• mysql query for getting all messages that belong to user's contacts

  - by aharon

  So I have a database that is setup sort of like this (simplified, and in terms of the tables, all are InnoDBs): Users: contains based user authentication information (uid, username, encrypted password, et cetera) Contacts: contains two rows per relationship that exists between users as (uid1, uid2), (uid2, uid1) to allow for a…

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• regenerate the ID row in a MySQL Table with a Mysql's Script or PHP

  - by DomingoSL

  Hello, i have a database fill with information of the users who use my webpage. The table as many MySql tables have the ID parameters who is autoincrement. The issue is that when somebody eliminate his account from the site, in the database remain a jump in the sequence that i dont want cuz i have a script who fail if find some jump in the…

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• Saving commands for later re-use in MySQL?

  - by Zombies

  What would be the equivalant in MySQL for: Saving a command for later reuse. eg: alias command1='select count(*) from sometable;' Where then I simply type command 1 to get the count for SomeTable. Saving just a string, or rather part of a command. eg: select * from sometable where $complex_where_logic$ order by attr1 desc; WHere…

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• Optimize MYSQL Query with Order by

  - by Victor

  Hello, I have seen mysql queries with order by runs slow. Is there any specific way to optimize queries which use order by ? Queries without order by run very fast but with order by its always runs slow. if any one suggest any thing on this as general solutions. Thank You

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• MySQL Workbench - How to synchronize the EER Diagram

  - by Tiago Alves

  I am creating a visual representation of my existing database with MySQL Workbench and I am able to synchronize the models with the "Database - Synchronize Model..." menu. However, every time I synchronize (update) my model, I have to recreate the EER Diagram and rearrange all the tables. Is there a way to update or synchronize the…

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• MySQL foreign key creation with alter table command

  - by user313338

  I created some tables using MySQL Workbench, and then did forward ‘forward engineer’ to create scripts to create these tables. BUT, the scripts lead me to a number of problems. One of which involves the foreign keys. So I tried creating separate foreign key additions using alter table and I am still getting problems. The code is…

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• MySQL - Order results by relevancy, LEFT JOINS and more

  - by XaviEsteve

  Hi guys, I am trying to get some results ordered by total votes (where client votes count 2 points and other people votes are 1 point). tab_names: +-----------+ | Name | id | +------+----+ | John | 1 | | Paul | 2 | +------+----+ tab_votes: +--------+-----------+ | idname | ip | +--------+-----------+ | 2 |…

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• multi word query in mysql

  - by salmane

  Hi there , in order to make things easier for users i want to add multiple keyword search to my site. so that in the input the user would do something like : " keyword1 keyword 2" ( similar to google for example. would i need to write a code that would parse that string and do queries based on that or is there something built…

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• How to create sql insert query dynamically in mysql

  - by nectar

  I am creating an application where I am generating pins dynamically based on user's input and storing them into mySql database. $sql = "INSERT INTO tblpin ('pinId', 'ownerId', 'usedby', 'status') VALUES for($i=0;$i<$npin;$i++) { ('$pin[$i]','$ownerid', 'Free', '1'); } ;"; …

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• Counting the number of select statements, connections per user in MySQL

  - by Michelangelo

  Hi guys, how can I count the number of connection and queries by user per day? I need a little list of users, previously registered in my MySQL Server, with the total of the queries and connections. For instance: users | Queries user01 | 120000 user02 | 340000 user03 | 1540000 user04 | 1244000 …

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• Timeout error occurred trying to start MySQL Daemon. CentOS 5

  - by epema

  I ran into troubles with MySQL on my CentOS. I had some problems and backed up my database and removed mysql with all dependencies. After that I ran reinstalled: yum groupinstall "MySQL Database" Installed without errors. Running the mysql daemon: service mysqld start Timeout error occurred trying to start MySQL…

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• mySQL - One large query vs Ajax indivdual queries

  - by Mark

  Hi guys, I guess no one will have a definative answer to this but considered predictions would be appriciated. I am in the process of developing a mySQL database for a web application and my question is: Is it more efficient to make a single query that returns a single row using AJAX or To request 100 - 700 rows…

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• MySQL - Using an alias in a subquery with WHERE clause

  - by gaoshan88

  I have a feeling I am completely borking this MySQL query but I'll ask anyway. I am wondering why I get the warning Unknown column 'FOO', and how I can get this query to work properly, in 'where clause' when I run the following: SELECT sample_id as FOO FROM tbl_test WHERE sample_id = 521 AND sample_id IN ( Select…

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• MySQL, Implementing a ViewCount that automatically add +1 every time

  - by nobosh

  I'm MySQL, I have a table full of docs. Each row represents a doc. I'd like to have a data column for "VIEWS" that automatically adds +1 every time the row is accessed and avoid needing to write a SQL UPDATE that hits the DB after the SELECT to get the doc in the web app. Any smart clever ways to solve for this? …

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• Best way to check for NULL value in MySql query

  - by PHP-Prabhu

  Can any one please let me know the best way to use IF statement in mysql query to show if the "email" field is NULL then it should show as "no email"... Postcode Telephone Email ---------------------------------------------------------- BS20 0QN 1275373088 no email BS20 0QN 1275373088…

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• Allow number to start with ZERO when stored in mysql integer field

  - by NetCaster

  I need to store phone numbers starting with 0 but whenever i try to store this in MySql table the starting ZERO is removed because no number start with Zero actually how i can solve this problem please do i need to change the field type from Integer to another type please help

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