title: mysql/oracle stored math formula
body: <p>is there any way apply math formula from stored string in Oracle and or MySQL?</p>
  
  <pre><code>col1 | col2 | formula
  ---------------------
   2   |  2   | col1*col2
   2   |  3   | col1+col2 
  
  SELECT * from tbl
  
  result:
  col1 | col2 | formula
  ---------------------
   2   |  2   |   4
   2   |  3   |   5
  </code></pre>
  
  <p>edit: for each row another formula</p>