Liyuan (Colin) Chen@colchenFollow BadgesSql CertificationsCertificate: SQL (Basic)VerifiedskillCertificate: SQL (Intermediate)VerifiedskillCertificate: SQL (Advanced)VerifiedskillWork Experiencecolchen has not updated employment details yet.Educationcolchen has not updated education details yet.Linkscolchen has not updated links details yet. Skillscolchen has not updated skills details yet.