* GoogleSearch: mysql pivot query
    * **[[http://www.databasejournal.com/features/mysql/article.php/3865811/MySQL-Multi-Aggregated-Rows-in-Crosstab-Queries.htm|MySQL Multi-Aggregated Rows in Crosstab Queries]]**
    * **[[http://dev.mysql.com/tech-resources/articles/wizard/index.html|MySQL Wizardry]]**
    * [[http://en.wikibooks.org/wiki/MySQL/Pivot_table|MySQL/Pivot table (wikibooks)]]