Boris Ratchev@boris_ratchevData Science ManagerUnited StatesFollow BadgesSql CertificationsCertificate: SQL (Basic)VerifiedskillCertificate: SQL (Intermediate)VerifiedskillCertificate: SQL (Advanced)VerifiedskillWork Experienceboris_ratchev has not updated employment details yet.Educationboris_ratchev has not updated education details yet.