Webservices data are stored in database?

Hey an fetching data from web services and set to pie chart .when am running first time it shows correct but when refresh it or run second time then it value added multiple times..my question is why web services data are stored in database..how to set directly web service result to pie chart...i don't want to stored it and where it is stored am confuse in that.please help to resolve this issue.
1 answers

It sounds like you're committing the data from the web service. I believe your pie charge may require persisted data. So, just make sure you delete the data before you add new data.