MySQL update from one table to another with condition not working?

Question

I have tried a solution that seems to work for someone else on this question:

Update table a from table b where (conditions) I can not seem to get it working, MySql

Answer 1

Try this:

UPDATE video_data SET date_timestamp = (SELECT video.date_timestamp FROM video WHERE  video.video_id = video_data.video_id)

Although the error in your actual query is simply that you missed a "SELECT"

UPDATE video_data SET video_data.date_timestamp = SELECT video.date_timestamp FROM video_data JOIN video ON video_data.video_id = video.video_id

But I don't think it is what you want it to be.