How to query data through table connection in yii framework

First create the database and data table, as shown in the figure below (partial screenshot):

Database:

Data table:

(Related tutorial recommendations: yii framework)

jf_stu:

##js_class:

js_school：

js_record：

Example:

//表连接，查询出学生、班级、校区、记录表的所有数据
		$data=Jf_record::find()
		->join('join','jf_stu','jf_record.sid=jf_stu.sid')
		->join('join','jf_class','jf_stu.cid=jf_class.cid')
		->join('join','jf_school','jf_class.xid=jf_school.xid')
		->select('*')
		->where(['jf_record.re_id'=>$re_id])
		->asArray()
		->one();
		echo $data[&#39;sname&#39;].&#39;<br>&#39;;
		echo $data[&#39;sex&#39;].&#39;<br>&#39;;
		echo $data[&#39;rtime&#39;].&#39;<br>&#39;;
		echo $data[&#39;cname&#39;].&#39;<br>&#39;;
		echo $data[&#39;school&#39;].&#39;<br>&#39;;
		die;

Output result:

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