Sergey Sidorov@sergeymongFollow BadgesProblem SolvingDays of CodeDays ofStatisticsSql CertificationsCertificate: SQL (Basic)VerifiedskillWork Experiencesergeymong has not updated employment details yet.Educationsergeymong has not updated education details yet.LinksGithubhttps://github.com/sergeymong Skillssergeymong has not updated skills details yet.