sql - How to get average of views before clicking on advertisement? -


i've got 2 tables containing information viewing , clicking on advertisement each user:

clicks:

userid   action   time 123      c        2016-01-08 01:57:00 123      c        2016-01-11 03:17:12 200      c        2016-01-09 02:20:10 332      c        2016-01-12 07:07:07

views:

userid   action   time 123      0        2016-01-07 01:33:00 123      0        2016-01-10 04:12:13 200      w        2016-01-08 02:20:10 332      0        2016-01-09 07:07:07 332      0        2016-01-10 07:07:07 332      0        2016-01-11 07:07:07

i want know average of views before clicking on advertisement first time, second time etc. example above: user 123 clicked first time having 1 view before, user 200 also, , user 332 had 3 views before clicking first time. average first click (1+1+3)/3=1.67. user 123 clicked twice, after 2 views (in total).

the result want looks this:

nr_clicks  avg_views 1          1.67 2          2 ...

the action column in views table can take different values (but not c), in clicks table c. trying use join subquery , average results didn't expected.

ok, take me time think works well:

select clickcume nr_clicks, avg(view_b) avg_view_before from( select userid, clickcume, max(viewcume) view_b from( select a.*, b.time_v, b.viewcume     (   select userid, time time_c,           count(*) on (partition userid order time) clickcume   views) join  (   select userid, time time_v,          count(*) on (partition userid order time) viewcume   clicks) b    on (a.userid=b.userid) time_c>=time_v ) c group userid, clickcume ) d group clickcume

Comments

Post a Comment

Popular posts from this blog

javascript - jQuery: Add class depending on URL in the best way -

i have html progress meter: <div class="col-md-3" style="margin-left: -20px;"> <div class="progress-pos active" id="progess-1"> <div class="progress-pos-inner"> login </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-2"> <div class="progress-pos-inner"> scan items </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-3"> <div class="progress-pos-inner"> confirm address </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-4"> <div class="progress-pos-in...
Read more

caching - How to check if a url path exists in the service worker cache -

i need check if particular url path exists in service worker cache. example, suppose url is: /myserviceworker/service?a=110&b=70 this url exists in cache, there many of them different values of , b. now, suppose want refresh of these urls, how can that? i want know how access key values service worker cache. if know key, plan follows: var url = new url(key); if(url.pathname === "\/myserviceworker/service") refetch key but not sure how cache key , in format is. mean, string or url? cache api has match() method returns promise resolving in response object if match or undefined if no match exists. second parameter object can specify ignoresearch not take account url parameters. the ignoresearch option supported firefox ( chrome status here ). in other hand, retrieve cache entries, can use keys() method.
Read more

Redirect to a HTTPS version using .htaccess -

i need modify .htaccess file redirect urls https version without "www". http://example.com --> https://example.com http://www.example.com --> https://example.com https://www.example.com --> https://example.com this how .htaccess file looks like: rewriteengine on rewritecond %{request_filename} !-d rewritecond %{request_filename} !-f rewriterule ^(.*)$ redirect.php?id=$1&page=$2 [qsa,l] what modifications need make .htaccess in order forward https without "www"? it depends on doing current code. looks file called redirect trying display php page seo friendly url. think might confusing people. anyway, need , force https without www, need 1 more rule above. also second rule needs two capture groups in rewriterule test string because wanting 2 different values using $1 , $2 references. rewriteengine on #rediect www non www and/or http https --- combinations. rewritecond %{http_host} !^example\.com [nc,or] rewritecond %{https} !^...
Read more