1 $test_data = M(‘hot‘); //实例化数据表 2 $data = $test_data->Distinct(true)->field(‘descriprion‘)->order(‘description desc‘)->select(); //利用distinct方法去重 3 $data = $test_data->group(‘department‘)->order(‘description desc‘)->select(); //利用group方法去重 4 dump($data);
原文：http://www.cnblogs.com/boundless-sky/p/6074526.html