title: PHP Search in multiple tables using a keyword
body: <p>I have two tables, Student and University.</p>
  
  <p>I want to use a student number as a keyword to search for a record in Student and University tables. I tried using <code>%$keyword%</code> but it doesn't produce any result.</p>
  
  <pre><code>$sql = "SELECT * FROM Student join University";
  </code></pre>
  
  <p>Thanks</p>