Hits counter issue

Question

I just set a simple counter to track hits on multiple pages (4 to be exact) using a fairly simple Coldfusion code. Now, maybe I am crazy, but my issue occurs when (this is surely questionable) the adsense code is present on the page!? Simply put, it acts weird all the time, adding +2 or +3 instead of +1?
here is the code:
<cfparam name="URL.ID" default="1">
    <cfquery name="updateHits" datasource="mydatasource">
          UPDATE table
          SET TOTALHITS = TOTALHITS + 1
          WHERE ID = <cfqueryparam value="#URL.ID#" cfsqltype="cf_sql_clob" maxlength="75">
      </cfquery>
what seems to be the problem? should I use cffunction perhaps, on the page or in cfc?
I am running CF MX7.

Answer 1

Various distinct pages could send the same url.id to the server, for example,
page1.cfm?id=1
page2.cfm?id=1
page3.cfm?id=1
and so on. Hence, it isn't yet clear to me why you use url.id to count page hits.
Owain has already hinted at a more reasonable solution. The page count is performed in onRequestStart in Application.cfc.
Create a table, say pageHit, with columns id(autoincrement int), pathFromRoot(varchar), hits(int). You could, for example, already insert all the possicle CFM pages of your site into  the pageHit table, giving each an initial hits count of 0.
Here is an example to illustrate. My sample site has just 2 CFM pages. The paths are relative to the webroot.
pageHit (database table)
id = 1
pathFromRoot = /testDir/page1.cfm
hits = 0
id = 2
pathFromRoot = /testDir/page2.cfm
hits = 0
The calculation for the page hits is:
<cffunction name="onRequestStart">
<cfargument name = "targetPage" type="String" required="true">
    <cfset var detectPage = queryNew("","")>
    <cfset var countPage = queryNew("","")>
   <!--- identify current page --->
    <cfquery name="detectPage" datasource="my_dsn">
        select id
        from pageHit
        where path = '#arguments.targetPage#'
    </cfquery>
   <!--- update number of hits --->
    <cfif detectPage.recordcount GT 0>
        <cfquery name="countPage" datasource="my_dsn">
            update pageHit
            set hits = hits + 1
            where id = #detectPage.id#
        </cfquery>
    </cfif>
</cffunction>