```json { "table_name": "cleandata_v4", "primary_key": "_unnamed_0", "candidates": [ { "rank": 0, "partition_key": "_unnamed_0", "partition_key_label": "primary_identifier", "partition_key_reasoning": "RPUV=1.00 (perfectly unique), uniqueness=1.000, monotonic sequence. This is the primary identifier for each boxing match record in the dimension table.", "clustering_key": null, "clustering_key_label": null, "clustering_key_reasoning": "Dimension tables typically do not require internal sorting. Each row represents a distinct match entity.", "world_line": null, "session_column": null, "confidence": "HIGH", "notes": "This is a dimension table of boxing matches. _unnamed_0 (and its duplicate X) serve as the unique match identifier. The table contains 115 distinct boxing match records with detailed fighter statistics. No clustering needed as dimension tables are typically accessed by primary key lookups." } ] } ```