Difference in the data between API and Dashboard Interface

Hello, I retrieve a set of statistics through CAMPAIGN_PERFORMANCE_REPORT. Here's what I do via c #: SELECT CampaignName, CampaignId, Cost, Impressions, Clicks > FROM CAMPAIGN_PERFORMANCE_REPORT WHERE CampaignName = [CampaignName]; I noticed that I had differences between statistics that I

Difference in the data between API (CAMPAIGN_PERFORMANCE_REPORT) and Dashboard Interface

anyone have an answer to that? In some cases, there are substantial differences. Thank you in advance for your answer. Pierre C. -- -- =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ Also find us on our blog and Google+: https://googleadsdeveloper.blogspot.com/ https://plus.google.com