Is it possible to sort the table?

Not using the Drupal api unfortunately. The table sort functions in Drupal depend upon being able to assign a column header to a db column. In this case all of the table data is serialized in one column, so there is nothing to sort on. That said, there are some ways to do it in Javascript. I'm sure there's a jQuery library out there that would make it super easy.

Good luck!

Original post by Molot

http://tablesorter.com/docs/ - this jQuery plugin might help, if all you want is to sort on display.

found in this TableField issue

Module:
https://www.drupal.org/project/tablesorter

enjoy^^