title: Core Reporting API v4 sampling limit for click data
body: <p>After how many clicks will the Core Reporting API start to sample the click data, when using <code>samplingLevel=LARGE</code>?</p>
  
  <p>I'm trying to retrieve data from a large account (i.e. more than 30,000 clicks/day on average) and the number of clicks doesn't always match what I can see on Google Analytics. This, however, seems to happen only on this large account, and not every day. Strangely, on those days where the click count doesn't match, transactions and revenue match what I can see in Google Analytics.</p>
  
  <p>In my query, I'm only trying to retrieve the data for a given account, without applying any filter.</p>
  
  <p>EDIT: If I don't retrieve data aggregated at the account level ― thus not including <code>ga:adwordsCampaignID</code>, <code>ga:adwordsAdGroupID</code> and <code>ga:adwordsCriteriaID</code> in the dimensions ― I can retrieve all the clicks.</p>
  
  <p>EDIT2: If add the <code>ga:deviceCategory</code> dimension, along with <code>ga:adwordsCampaignID</code>, <code>ga:adwordsAdGroupID</code> and <code>ga:adwordsCriteriaID</code> I can retrieve all clicks. I'm not sure if this can help narrow down the issue.</p>