This wiki explains how to add calculated fields into your Yii Framework 2.0 gridview with filtering and sorting. >Note: If you are looking at filtering and sorting by SUMMARY data from related tables, then refer [this wiki]("http://www.yiiframework.com/wiki/679/filter-sort-by-summary-data-in-gridview-yii-2-0/").

Example Structure
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Let's say you have the following tables:
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