How to get ratio of different values in the same field?

[constantinetabs]

How do I get the ratio for two values of the same field? When I run the following command:

host=web_app action=* file=* status=200
| stats dc(JSESSIONID) BY action

I get the followin output:

How could I get the ration of purchase and view action? What I want to see is how many people viewed the products and how many of them actually bought a product.

[to4kawa · Accepted solution]

host=web_app action=* file=* status=200
| eval action = if(action = "purchase" OR action = "view", "p & v", action)
| stats dc(JSESSIONID) BY action

hi, how about this?