Yesterday I updated the date column of an entire table meant for its subset only. The solution to this mistake was to recover from daily mysqldump, and filling in the gaps that were, thankfully, able to be filled in.
Writing in 2010, the author of the answer said:-
When something goes wrong, the only restoration option available is to reconstruct the data from a backup (providing one exists).
Here are two answers that I found useful; i.e., Stack Overflow, the gift(s) that keeps on giving: