Place cucumber slices in a colander. Generously sprinkle salt over cucumber; let sit until water starts to bead on the slices, about 10 minutes. Drain water from cucumber slices.
Whisk sour cream, vinegar, yogurt, mayonnaise, lime juice, sugar, and dill together in a large bowl until dressing is smooth. Mix cucumber, onion, and celery into dressing until evenly coated; season with salt and pepper.
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