title: Use output data from Copy activity in subsequent activity
body: <p>I have a ForEach activity which uses a Copy activity with an HTTP source and a blob storage sink to download a json file for each item. The HTTP source is set to Binary Copy whereas the blob storage sink is not, since I want to both copy the complete json file to blob storage and also extract some data from each json file and store this data in a database table in the following activity.</p>
  
  <p>In the blob storage sink, I've added a column definition which extracts some data from the json file. The json files are stored in blob storage successfully, but how can I access the extracted data in the subsequent stored procedure activity?</p>