David Zheng@david_quest_93IndonesiaFollow BadgesProblem SolvingDays of JSSql CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillCertificate: Problem Solving (Advanced)VerifiedskillCertificate: SQL (Basic)VerifiedskillCertificate: SQL (Intermediate)VerifiedskillCertificate: SQL (Advanced)VerifiedskillWork Experiencedavid_quest_93 has not updated employment details yet.Educationdavid_quest_93 has not updated education details yet.