title: "ORA-00922: missing or invalid option" when creating tables
body: <p>I entered the following SQL commands in Oracle but it complained "ORA-00922: missing or invalid option"</p>
  
  <pre><code>CREATE TABLE Student (
      StuID     NUMBER(15),
      StuName   VARCHAR2(50),
      Phone     VARCHAR2(20),
      PRIMARY KEY (StuID))
  
  CREATE TABLE Program (
      ProCode       VARCHAR2(12),
      ProTitle      VARCHAR2(50),
      PRIMARY KEY (ProCode))
  </code></pre>
  
  <p>WHY???</p>