mysql

MYSQL Convert rows to columns performance problem

I am doing a query that converts rows to columns similar to this post but have encountered a performance problem. Here is the query:- SELECT Info.Customer, Answers.Answer, Answers.AnswerDescription, Details.Code1, Details.Code2, Details.Code3 FROM Info LEFT OUTER JOIN Answers ON Info.AnswerID = Answer...

Having a number in

Can someone give me a query that will return as a result rows ID 1 & 3? ID Name Hidden 1 Mika 1,4,2 2 Loca 0 3 Nosta 4 4 Like 2 Something like this SELECT * FROM table WHERE Hidden HAVING(4) ...

How do I aggregate results from an Adjacency list using PHP's SPL

I've tried using nested sets, and they become very difficult to maintain when dealing with multiple trees and lots of other complications.. I'd like to give PHP's SPL library a stab at this (btw, we are PHP 5.3, MySQL 5.1). Given two datasets: The Groups: +-------+--------+---------------------+---------------+ | id | parent | Cate...

How do I echo out something different when reached last row?

I am wanting to not echo out the comma at the end of the echo after the last row. How can I do that? Here is my code: <?php header("Content-type: application/json"); echo '{"points":['; mysql_connect("localhost", "user", "password"); mysql_select_db("database"); $q = "SELECT venues.id, venues.lat, venues.lon, heat_...

How To - Automatic Backup and Restore MySQL db from Web Server to Local Machine

I have a web app that is supposed to be run on a single local machine (kiosk display), but I want the option to let a user make changes on the web (from any PC) and update the instance on their local PC (kiosk display). From what i imagine, the MySQL instance on the web server will just replace the MySQL instance on the local (kiosk dis...

Binary string search on one field.

I have 300 boolean fields in one table, and im trying to do somithing like that: One string field: 10000010000100100100100100010001 Ha a simple way to do a simple search os this field like: select * from table where field xor "10000010000100100100000000010001" Im tring this but is to long: select * from teste where mid(info,2,1...

How should i store availability calendar information in mysql? for [id] [date] [available/unavailable]

I'm building a simple calendar for holiday cottages to show when they are booked or available. What would be the fastest mysql table design for this, bearing in mind when users mark dates as available/booked they will do so via a start date and an end date. i can see 2 obvious options Store 'booked' data for every day [more rows] or,...

Can MySQL automatically specify `_utf8` for inserts to UTF-8 columns?

I have a table like this, where one column is latin1, the other is UTF-8: Create Table: CREATE TABLE `names` ( `name_english` varchar(255) character NOT NULL, `name_chinese` varchar(255) character set utf8 default NULL, ) ENGINE=MyISAM DEFAULT CHARSET=latin1 When I do an insert, I have to type _utf8 before values being inserted in...

Need a MYSQL query to compare two tables and only output non matching results

I have two tables in my database, one contains a list of items with other information on these items. The other table is contains a list of photographs of these items. The items table gives each item a unique identifier,which is used in the photographs table to identifier which item has been photographed. I need to output a list of it...

python os.execvp() trying to display mysql tables gives 1049 error - Unknown database error.

I have a question related to mysql and python. This command works on the shell, but not when I use os.execvp() $./mysql -D test -e "show tables" +----------------+ | Tables_in_test | +----------------+ | sample | +----------------+ The corresponding piece of code in python would be def execute(): args = [] args.extend(sys.a...

How to get #entries of last hour in MySQL, correcting for timezone?

I am storing activity entries in a MySQL table. The table has a date_created field of type timestamp and through PHP I insert the activity entries based on GMT: $timestamp = gmdate("Y-m-d H:i:s", time()); This works fine. On my client I am on GMT+2. If it is 16:00 here and I insert an entry, it is stored in MySQL as 14:00. This is as ...

No tables found

Hi, After installing phpMyAdmin on a server I logged in with the username and pw of an existing db. But now I can see just the name of that db that already exists (and "information schema" db), but I can't see the tables inside the existing table. I do see the tables inside "information schema". Did I forget something while installing p...

I am searching for a string like Cityname, State in mysql table where state name is 2 letter char.

I am searching for a string like Cityname, State (e.g.Moline,IL) in mysql table. How can i make the query using regexp in mysql. ...

php smart learner

Is there a possibility to create a html or a php page that will count redirects? I mean, let's say you have a page with a link in it. I want the page to count how many times the link is clicked per ip adress or username. The counting would be reported into a log file or text document. ...

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

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 t...

How do I flip a column in mysql that has data structured: 'last name, first name'?

I want to create a new column in a MYSQL table that has Fn Ln instead of Ln, Fn. Most of my data is printed Fn Ln. Another idea is to incorporate a string function each time there is an output (php based) but that seems to waste resources. Finally, I couldn't find the syntax (loop or foreach) for my php function anyway. Here is the...

Multiple database with NHibernate

Hi, I have two databases. One from Oracle 10g. Another from Mysql. I have configured my web application with Nhibernate for Oracle and now I am in need of using the MySQL database. So how can i configure the hibernate.cfg.xml so that i can use both of the database at the same application? My current hibernate.cfg.xml is: <?xml versio...

PHP: Sending bulk emails from a query result

How can I send an email to all results from a certain field at once? ...

Mysql : should i put my data into 1 table or split per user?

This data is for a holiday cottage's simple accommodation calendars. The data is simple and stores dates when each cottage is booked. The cols would be cottage_id, booked_from_date, booked_until_date and I would expect around 60 rows per user per year * 200-300 users. I should put this is one table right? ...

SQL Syntax Error 1064

Hi, I keep getting the following 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 systax to use near ''isbn10','isbn13','title','edition','author_f_name','author_m_name','author_l_na' at line 1 when trying to populate my MySQL data...