Sergey Sertakov@bernh123DeveloperFollow BadgesJava CertificationsCertificate: SQL (Basic)VerifiedskillCertificate: SQL (Intermediate)VerifiedskillWork Experiencebernh123 has not updated employment details yet.Educationbernh123 has not updated education details yet.Linksbernh123 has not updated links details yet. Skillsbernh123 has not updated skills details yet.