title: SQL select string that doesn't contain Y but contains X
body: <p>I'm attempting to select all of the instances where this database field has a string but does not contain a specific value.</p>
  
  <p>Example: I'm trying to select every instance of "red chair" where "red chair" is not proceeded by "big". If I were to run that query in the following table, I'd only get the row with the ID of 2 back:</p>
  
  <pre>
  +----------+--------------+---------+
  | ID       |        content         | 
  +----------+------------------------+
  | 1        | The big red chair      |
  | 2        | I have a red chair     |
  | 3        | I have a big chair     |
  +----------+------------------------+
  </pre>
  
  <p>Thanks in advance!</p>