select distinct d.DescriptorId, d.CodeValue, d.Namespace from oneroster.CurrentStudentSchoolAssociation as cssa
inner join edfi.GradeLevelDescriptor as gld on cssa.EntryGradeLevelDescriptorId = gld.GradeLevelDescriptorId
inner join edfi.Descriptor as d on gld.GradeLevelDescriptorId = d.DescriptorId
left join ceds.CEDSEdFiGradeLevelCrosswalk as ceds on ceds.EdFiGradeLevelDescriptorId = gld.GradeLevelDescriptorId
where ceds.CEDSEntryGradeLevelId is  null