Peter Lengers@RoelandLengersNetherlandsFollow BadgesDays of JSSql CertificationsCertificate: SQL (Basic)VerifiedskillCertificate: SQL (Intermediate)VerifiedskillCertificate: SQL (Advanced)VerifiedskillWork ExperienceRoelandLengers has not updated employment details yet.EducationRoelandLengers has not updated education details yet.