title: ORA-00905: missing keyword in oracle query
body: <p>I have 2 tables category and coupon_category in my oracle database</p>
  
  <p>I am making query </p>
  
  <pre><code>select coupon_category.coupon  from coupon_category  JOIN category;
  </code></pre>
  
  <p>which gives me error</p>
  
  <pre><code>SQL&gt;    select coupon_category.coupon  from coupon_category INNER JOIN category;
          select coupon_category.coupon  from coupon_category INNER JOIN category
                                                                                *
  ERROR at line 1:
  ORA-00905: missing keyword
  </code></pre>
  
  <p>What is the mistake I am making?</p>