I am trying to write a query that will show me the last date/time a specific query was run. I have looked into v$sql and I can find the query, but from what I can tell it does not show the last time the query was executed.
use v$sqlarea instead of v$sql and look at the column last_active_time. See also the documentation (docs.oracle.com/cd/E11882_01/server.112/e40402/title.htm) on the dynamic performance views in the database.
You will get more answers, however, if you put your question to the forum Oracle Database > SQL and PL/SQL .