I'm querying a server at certain points in time and trying to append any new rows/update changed values. The information is continuous in time with datestamps for when something occurred and when a field was last updated. To carry out the new output I thought the easiest approach would be to union the existing alteryx database with the queried data and taking the latest [update datestamp] row for every [event datestamp]. I thought this can be accomplished with the unique tool but wanted to confirm that it computes in a linear fashion (top to bottom) so when I sort in descending [update datestamp] by [event datestamp] it will populate the first row in the unique output. i.e.
Update Datestamp Event Datestamp
01/02/2017 11:22:33 01/01/2017 03:04:05 <-This line taken to "U" output in Unique Tool
01/01/2017 10:20:30 01/01/2017 03:04:05 <-Next 2 lines taken to "D" output in Unique Tool
01/01/2017 04:05:06 01/01/2017 03:04:05