php - 如何使用创建命令查询器

Question

我有这样的查询

Yii::app()->db->createCommand("SELECT * FROM `tbl_one` t1 LEFT JOIN `tbl_two` t2 on       t1.idea_id = t2.id WHERE create_time >=:t")->bindValues(array(":t" =>$start))->queryScalar();

在 yii 农场工作，但工作量不大！！请帮我

Answer 1

您可以删除queryScalar()，因为它会尝试从数据库中获取一个结果，

并用于queryAll()获取所有结果

Answer 2

It is not the answer, because tinybyte already answed it. for yii better understanding. please see

 // execute a query SQL
 Yii::app()->db->createCommand($yoursql)->query(); 

 // query and return all rows of result        
 Yii::app()->db->createCommand($yoursql)->queryAll();  

  // query and return the first row of result     
 Yii::app()->db->createCommand($yoursql)->queryRow(); 

 // query and return the first column of result
 Yii::app()->db->createCommand($yoursql)->queryColumn();  

 // query and return the first column of result
 Yii::app()->db->createCommand($yoursql)->queryScalar();