There are situations in which Active Record will generate nonsense queries from what a nieve Yii user might think is reasonable code. One such situation is a CActiveDataProvider using CDbCriteria to get data from parent and 1:n child table with a condition on the child table.
find doubletts by db fields.
in this example i will check doublets for 3 tabelfields (col1,col2,col3).
so i will get a subquery with the condition, select and grouping of the tablefields. the having with COUNT() > 1 means: find all records more then one result.
Hi I had made simple archive system for blog system that can handle tbl_post. I had used simple CDbCriteria not more than that. I know there is more and many better way to this but I think this will give some idea to users to generate new idea or customized or modified this version of code.