So many variations only so many cucumbers to be had!
It can be as simply as: cucumbers and vinegar (apple or white, I prefer apple) and sliced onions with pepper. I do not salt this as the salt will leach out water from your cukes and tomatoes and make the mixture, well, watery
The addition of tomatoes and/or onions to this can be quite nice. Then you can add a bit of sugar to this if you want yet another variation.
Mix some sour cream, apple cider vinegar to thin a bit, sugar to subtly sweeten, salt and lots of black pepper. Serve fairly soon because of the salt. You can also leave the salt out and add as needed on your plate. Add onions as a variation on this.
Then there is the oil version with LOTS of sugar that is quite good also.