title: SQL Error: ORA-00904: : invalid identifier on table that exists
body: <p>I am trying to add a column to an existing database column using the following statement:</p>
  <pre><code>ALTER TABLE REVISION ADD COLUMN IS_BLACK NUMBER(1);
  </code></pre>
  <p>I get the following back:</p>
  <blockquote>
  <p>Error starting at line : 1 in command - ALTER TABLE REVISION ADD
  COLUMN IS_BLACK NUMBER(1)</p>
  <p>Error report - SQL Error: ORA-00904: :
  invalid identifier
  00904. 00000 -  &quot;%s: invalid identifier&quot;
  *Cause:<br />
  *Action:</p>
  </blockquote>
  <p>Revision is a table, I can run describe on it and it outputs.  What is the invalid identifier?  I'm confused and can't find answers online.</p>