Letti Liu@lettiliuFollow BadgesProblem SolvingSql CertificationsCertificate: SQL (Basic)VerifiedskillCertificate: SQL (Intermediate)VerifiedskillWork Experiencelettiliu has not updated employment details yet.Educationlettiliu has not updated education details yet.Linkslettiliu has not updated links details yet. Skillslettiliu has not updated skills details yet.