yii

public function search() {        $criteria = new CDbCriteria;        if(!isset($_GET['Record_sort'])){            $criteria->order = 'record_order ASC' ;        }        $criteria->compare('record_id', $this->record_id, true);        $criteria->compare('record_display', $this->record_display, true);        $criteria->compare('record_series', $this->record_series, true);        return new CActiveDataProvider($this, array(            'criteria' => $criteria,        ));    }

$criteria->compare('record_series', $this->record_series, true);这句有什么用?$criteria->compare('record_series', 'A', true);  就是where 'record_series'='A' $criteria->compare('record_series', $this->record_series, true) 加这句和没加这句,显示出的结果是一样的

回复讨论(解决方案)

$criteria->compare('record_id', $this->record_id, true);
$criteria->compare('record_display', $this->record_display, true);
$criteria->compare('record_series', $this->record_series, true);

将产生类似这样的条件表达式
record_id like '%$this->record_id%' and record_display like '%$this->record_display%' and record_series like '%$this->record_series%'
因为第三个参数你指定为 true 是模糊查询（默认是 false 精确查询）
第四个参数默认为 and

至于为什么要这么写，那是你的业务需要，别人说不了什么