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I need a help on how to check if the user exists in mysql cannot be added again?

Author Votes Δ
sriharichander 0 +0.09
SaggingRufus 0 -0.16
Subin Thomas 0 -0.38
Mohammed Elhag 0 -0.19
Last visited: Jan 2, 2016, 11:22:14 PM