how to get data from intersection of 2 SQL tables to php

Question

I want to take data from intersection of 2 SQL tables. I tried this

$sql = "SELECT ID, Name, Hostel FROM Student, HostelName WHERE Student.hostel_ID = Hostel.hostel_ID";

But it Did not work. I also tried this too.

$sql = "SELECT Student.ID, Student.Name, Hostel.HostelName FROM Student, Hostel WHERE Student.hostel_ID = Hostel.hostel_ID";

How can I fix this problem.

Answer 1

你的意思是 ：

$sql = "SELECT Student.ID, Student.Name, Hostel.HostelName FROM Student INNER JOIN Hostel ON Student.hostel_ID = Hostel.hostel_ID"; 

Answer 2

Assuming the fact that hostel_ID is the only attribute which is common between the two tables, you can do NATURAL JOIN on common attribute hostel_ID to achieve the desired result,

$sql = "SELECT ID, Name, Hostel FROM Student NATURAL JOIN HostelName";

Here's the reference:

• http://www.w3resource.com/mysql/advance-query-in-mysql/mysql-natural-join.php