```json { "action": "final", "content": "## Column Inventory for Callyeah Analytics Dataset\n\nThe dataset contains **14 columns** across 216 rows. Here's what each column represents:\n\n### Core Call Metrics\n- **Day** (VARCHAR) — Day of the week or date identifier for the call activity period\n- **Total Calls** (VARCHAR) — Total number of calls received in that period\n- **AI Handled** (VARCHAR) — Number of calls handled by the AI system\n- **Human Handled** (VARCHAR) — Number of calls escalated to or handled by human agents\n- **Voicemail** (VARCHAR) — Number of calls that went to voicemail\n\n### Performance Percentages\n- **AI Resolution %** (VARCHAR) — Percentage of calls successfully resolved by AI\n- **Human %** (VARCHAR) — Percentage of calls requiring human intervention\n\n### Unknown/Unmapped Columns\n- **_unnamed_7** (VARCHAR) — Purpose unclear from the data; contains ~117 distinct values\n- **_unnamed_8** (VARCHAR) — Purpose unclear from the data; contains ~142 distinct values\n- **_unnamed_9** (VARCHAR) — Purpose unclear from the data; contains only ~5 distinct values\n\n### System Metadata\n- **_ingestion_timestamp** (TIMESTAMP) — When the data was loaded into the system (all rows: 2026-09-29 17:23:34)\n- **_batch_id** (VARCHAR) — Batch identifier for the ingestion run (all rows: batch_bc2086992fe4)\n- **_source_file** (VARCHAR) — Original CSV file path\n- **_source_system** (VARCHAR) — Source system identifier (all rows: 'api')\n\n### Data Quality Notes\n\n**Type Inconsistency**: All numeric columns (Total Calls, AI Handled, Human Handled, Voicemail, and the percentage columns) are stored as **VARCHAR** (text) rather than numeric types. This means:\n- Mathematical operations require casting: `CAST(REPLACE(column, '%', '') AS DECIMAL)` for percentages\n- Aggregations need explicit conversion to numeric types\n\n**Sample Data Pattern**: The actual data shows a weekly summary structure with days of the week (Thu, Fri, Sat, Sun, Mon, Tue, Today) plus aggregate rows (TOTAL), suggesting this is a pre-aggregated report rather than individual call records.\n\n**Unnamed Columns**: Three columns (_unnamed_7, _unnamed_8, _unnamed_9) lack clear semantic meaning. Based on the range values shown in the metadata (references to \"Duration\", \"Sentiment Score\", \"Sentiment Label\"), these likely contain:\n- Call duration metrics\n- Sentiment analysis scores\n- Sentiment classifications\n\nHowever, without seeing actual values or having explicit column headers, their exact purpose cannot be confirmed from the available evidence." } ```