Column Reorder# group Reordering Contents: Reorder Partition hash_id partition() hash_partition() hash_partition() round_robin_partition() Reorder Compact duplicate_keep_option drop_nulls() drop_nulls() drop_nans() drop_nans() apply_retention_mask() apply_retention_mask() apply_boolean_mask() apply_deletion_mask() apply_deletion_mask() unique() distinct() distinct_indices() stable_distinct()