37355
$update = Yii::app()->db->createCommand()->update('User',
array('LogTimes' =>new Expression('COALESCE("LogTimes",0)+1'), 'LastLogDT'=>new CDbExpression('NOW()'), 'LastLogIP'=>$loginIp
),
"ID=".$userId
);函数COALESCE 是防止字段值一开始为null时候的处理
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