title: Unable to add check constraint to a column
body: <p>I am trying to create a simple table with a few columns. I would like to add a check constraint to one of the columns, see below:</p>
  
  <pre><code>create table jobs (
      JOB_ID varchar(10) not null,
      JOB_TITLE varchar(35) not null,
      MIN_SALARY decimal(6,0),
      MAX_SALARY decimal(6,0) 
      CHECK(MAX_SALARY&lt;=25000)
      );
  </code></pre>
  
  <p>This returns an error for the <code>CHECK</code> line. </p>
  
  <blockquote>
    <p>A comma or closing bracket was expected. (near CHECK)</p>
  </blockquote>
  
  <p>If I add a comma like to the previous line; <code>MAX_SALARY decimal(6,0),</code>, I am returned with more errors:</p>
  
  <blockquote>
    <p>A symbol name was expected! A reserved keyword can not be used as a column name without backquotes. </p>
    
    <p>Unexpected beginning of statement near MAX_SALARY</p>
    
    <p>Unexpected beginning of statement near 25000</p>
  </blockquote>