mysql

SQL Optimization

How to optimize this? SELECT e.attr_id, e.sku, a.value FROM product_attr AS e, product_attr_text AS a WHERE e.attr_id = a.attr_id AND value IN ( SELECT value FROM product_attr_text WHERE attribute_id = ( SELECT attribute_id FROM eav_attr WHERE attribute_code = 'similar_prod_id' ) AND val...

Ordering the result of a left join

This is the code i have: The 'media_work' table has an 'order' field that indicate the order of the files. I want to sort the result of the 'media_work' table to get the first item (image) This code works but doesn't order the 'media_work' SELECT work.id, work.title, media.file_name_thumb,media_work.order, COUNT(media.file_name_thumb)...

How do i load data Infile in multiple tables?

hi i run python program where im inserting many many new entries to database, this new entries are spread accross multiple tables. what is the quickest way to load them into database? at now im using something like this LOAD DATA LOCAL INFILE file INTO TABLE table FIELDS TERMINATED BY ',' LINES TERMINATED BY '\n' (col1, col2, c...

MySql or PHP function to convert longitude and latitude to decimal degrees.

Hello, I have spent sometime researching the forum and other places to resolve this but yielded nothing and I have decided to ask. I have log files containing NMEA sentences. I have stored this sentences which are in hundreds of thousands in mysql database. I have stored the longitudes and latitudes as double datatype. I want to conver...

problem connecting to mysql from vs2010

Hello, I am trying to connect to mysql using c# in vs2010. I installed the 6.3.5 version of the .net connector from the mysql site. I try using the following connection string - <add name="mySql" connectionString="Server=localhost;Database=mydb;Uid=User;Pwd=mypass;" providerName="System.Data.OleDb.OleDbConnection, System.Data, Versio...

How to move MYSQL 5.0 Database from one server to another.

Hi Friends, My need is to move the MYSQL 5.0 database from my development m/c to actual production m/c, How I can do this ??? On production m/c MYSQL is not installed, MY SQL 3.5 drivers are present. but on my m/c MYSQL 5.0 and MYSQLDrivers 5.0 are resent so will on production server 3.5 driver will support 5.0 vertion...If I created DS...

filesort in MySQL due to an OR condition in WHERE clause

I have this query: SELECT * FROM article WHERE (state = 2 OR state = 3) AND category_id = 100 ORDER BY mod_date DESC And I have defined this index: category_id_idx: state category_id mod_date When I run the query with an EXPLAIN, it returns this: id: 1 select_type: SIMPLE table: article type: range possible_keys: category_id...

I need to finalize this MySQL multiple table JOIN

I have entires, equipments, brands, times and seasons. entries: id time equipment_1 equipment_2 equipments: id id_brand brands: id name times: id id_season seasons: id name My actual SQL query is: SELECT entries.*, times.id_season AS id_season FROM entries, seasons WHERE entries.time = times.id But in the final qu...

Poorly performing Mysql subquery -- can I turn it into a Join?

I have a subquery problem that is causing poor performance... I was thinking that the subquery could be re-written using a join, but I'm having a hard time wrapping my head around it. The gist of the query is this: For a given combination of EmailAddress and Product, I need to get a list of the IDs that are NOT the latest.... these or...

mysql question - way to update case for field?

I have some entries in a field that look like this: NEvada city or nevada City... Is there a way to update the database so that entries have initial caps: Nevada City? ...

Find the count of EMPTY or NULL columns in a MySQL table

I have around 30 columns in a MySQL table. I want to calculate how many column fields for a particular row are empty. This table is for storing user information. I want to find out how many profile fields (such as 'Name', 'Age', 'Location' - all of which are stored in a separate column) are empty/haven't been filled in by the user. Th...

How to use plain SQL in Kohana 3.x

I dont want to rely on all those ORM/Querybuilder etc. tools in Kohana 3.x. I just want do use plain old SQL to Insert a new row in my table of my MySQL Database. How can I do that? ...

session_set_save_handler - Why isn't this code working?

Hello, I've been trying to save PHP session data in a MySQL database, but can't get it to work. For a simple example, here's code that should increment a counter with each visit. I've seen other examples, etc. but can someone please tell me why this code isn't working? (Apache/2.2.11 (Win32) DAV/2 mod_ssl/2.2.11 OpenSSL/0.9.8i PHP/5....

Accessing a database from CakePHP when behind a proxy server

I'm working on a web application that's using CakePHP and MySQL. Depending on the circumstances, I may be using one of two computers and I may be behind a proxy server that won't allow me to directly modify any code on my web server. Because of this, I've installed XAMPP on my machines to act as a local web server, and I keep my code i...

How do you run a complex sql script within a python program?

I have a large SQL script that creates my database (multiple tables, triggers, and such. Using MySQL), and I need to execute that script from within a python program. My old code did this: sql_file = open(os.path.join(self.path_to_sql, filename), 'r') sql_text = sql_file.read() sql_stmts = sql_text.split(';') for s in sql_stmts: c...

SQL : Using GROUP BY and MAX on multiple columns

Hey, I have an issue with an SQL Query. Lets take this example data itemID catID attrib1 attrib2 1 1 10 5 2 1 10 7 3 1 5 10 4 2 18 15 I want to return the best item for each category (with attrib1 having priority over attrib2) Obviously, "SELECT catI...

MySQL Configuration for Fluent NHibernate

Hi all! I have class-configurer fluent nhibernate for MySQL: class MySqlInitializer : INHibernateInitializer { public Configuration GetConfiguration() { var dbServer = "localhost"; var dbUsername = "root"; var dbName = "nhibernate"; var dbPassword = ""; var ormAssembly = "NHibernate_MySQL....

Help me select RDBMS for a standalone app. Few Concerns.

My app. is in C# 3.5 and MySQL 5.1. It is a Windows based standalone application. It is running successfully since last two years except few issues and that too were later found out to be MySQL bugs. The bug disturbed the real-time reports as it store the same timestamp in two rows. I don't know whether MySQL fixed it or not so I want t...

How to select and update a record at the same time in mySQL?

Is there any way to select a record and update it in a single query? I tried this: UPDATE arrc_Voucher SET ActivatedDT = now() WHERE (SELECT VoucherNbr, VoucherID FROM arrc_Voucher WHERE ActivatedDT IS NULL AND BalanceInit IS NULL AND TypeFlag = 'V' LIMIT 1 ) which I hoped would run the...

two full text mysql searches with union but return a distinct field, need help

SELECT DISTINCT sectionID FROM ( (SELECT sectionID,MATCH (content) AGAINST ('blah') AS relevance FROM sectioncontent WHERE MATCH (content) AGAINST ('blah')) AS alias UNION DISTINCT (SELECT sectionID,MATCH (name, description) AGAINST ('blah') AS relevance FROM sections WHERE MATCH (name, description) AGAINST ('blah')) ) I would even...