Search Results for: sql inner join where

Network at the Percona Live MySQL Conference and Expo

We’re very pleased with the speaker lineup for the Percona Live MySQL Conference and Expo. We have outstanding MySQL experts speaking on a variety of topics during the breakout sessions and tutorials. And the keynote speakers are all top notch, MySQL technology and industry experts who will share their views of the ecosystem. Beyond the […]

MySQL 5.6.10 Optimizer Limitations: Index Condition Pushdown

While preparing the webinar I will deliver this Friday, I ran into a quite interesting (although not very impacting) optimizer issue: a “SELECT *” taking half the time to execute than the same “SELECT one_indexed_column” query in MySQL 5.6.10. This turned into a really nice exercise for checking the performance and inner workings of one […]

New Keynote Speakers and Sponsors and Applications Open for DotOrg Pavilion for Percona Live MySQL Conference and Expo

I’m pleased to announce the first of the Percona Live MySQL Conference and Expo 2013 keynote speakers and new sponsors including Amazon Web Services, Google, Clustrix, Scalebase, PalominoDB, Database Trends & Applications, and Linux Journal. We are also now accepting applications for the DotOrg Pavilion. Also, nominations are now being accepted for the 2013 MySQL […]

FOSDEM 2013: MySQL And Friends Community Dinner

Just like previous years, the ‘MySQL And Friends’ community is gathering to have a dinner on the Saturdaynight of FOSDEM. This time it is on February 2nd, 2013. This year, it will not be an Italian restaurant, but more a Belgian style restaurant, about 10 minutes walk from the FOSDEM event. Mirabelle: http://www.mirabelle.be/index.php?lang=en Chaussée de Boondael, […]

A case for MariaDB’s Hash Joins

MariaDB 5.3/5.5 has introduced a new join type “Hash Joins” which is an implementation of a Classic Block-based Hash Join Algorithm. In this post we will see what the Hash Join is, how it works and for what types of queries would it be the right choice. I will show the results of executing benchmarks […]

Eventual Consistency in MySQL

We’re told that foreign key constraints are the best way to enforce logical referential integrity (RI) in SQL, preventing rows from becoming orphaned.  But then we learn that the enforcement of foreign keys incurs a significant performance overhead.1,2 MySQL allows us to set FOREIGN_KEY_CHECKS=0 to disable enforcement of RI when the overhead is too high.  But […]

MySQL data via a NoSQL solution, Free ticket to Percona Live London

The much-anticipated ability to access MySQL data via a NoSQL solution has been realized. Using HandlerSocket, significant performance gains can be realized for certain workloads. Sound like something you are interested in? Join us for Percona Live London to hear Ryan Lowe, Percona’s Director of American Consulting speak on this subject. In Ryan’s session he […]