title: Looking to calculate the number of items in column 1 that are within a certain date range that is in column 6, using commands
body: <p>So I have a CSV file with 21 columns.  Column 1 is author_ID and column 6 is publish date.  I am looking to output the total number of authors_IDs that are in the date range of 1/1/2017 0:00 to 12/31/2017 24:00.  So basically the total number of author_IDs in 2017. </p>