This solves the issue described in this Blog Post. I have a table of nearly 3 million rows that I can update right and left fields in about 60 seconds. This link was a life saver for me:
Ich kenne Carpenter Brut vom Spiel "Hotline Miami 2". Vielleicht gefällt dir auch Perturbator.
Lieblingslied von Carpenter Brut - Roller Mobster: https://www.youtube.com/watch?v=-awWHKaAgzg
Lieblingslied von Perturbator - She is Young - She is Beautiful - She is Next: https://www.youtube.com/watch?v=IGqeyQhBPMI