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Answers and rating deltas for

How do I get the input validation to see if user input already exists in the table?

Author Votes Δ
Ashar Dweedar 0 +1.24
Nuru Salihu 0 +1.63
Ivan86 0 +0.16
Shivanand Patil -1 -4.18
Last visited: Apr 8, 2018, 6:39:15 PM