<invoke name="tool_call"> <parameter name="reasoning">Compute pairwise Pearson correlations across all numeric columns in one query by unpivoting to long form and self-joining; return top pairs by absolute correlation.</parameter> <parameter name="tool">query_sql</parameter> <parameter name="args">{"sql":"WITH l AS (UNPIVOT (SELECT user_id, CAST(age AS DOUBLE) age, CAST(bedtime_phone_minutes AS DOUBLE) bedtime_phone_minutes, CAST(screen_brightness_pct AS DOUBLE) screen_brightness_pct, CAST(blue_light_filter_active AS DOUBLE) blue_light_filter_active, CAST(caffeine_post_5pm_mg AS DOUBLE) caffeine_post_5pm_mg, CAST(physical_activity_min AS DOUBLE) physical_activity_min, sleep_latency_min, total_sleep_hours, deep_sleep_pct, rem_sleep_pct, CAST(morning_alarm_snoozes AS DOUBLE) morning_alarm_snoozes, next_day_fatigue_score FROM raw.bedtime_screentime_sleep_debt) ON COLUMNS(* EXCLUDE (user_id)) INTO NAME col VALUE v) SELECT a.col AS col_a, b.col AS col_b, ROUND(corr(a.v, b.v), 3) AS r, ROUND(ABS(corr(a.v, b.v)), 3) AS abs_r FROM l a JOIN l b ON a.user_id = b.user_id AND a.col < b.col GROUP BY a.col, b.col ORDER BY abs_r DESC LIMIT 20","purpose":"Top pairwise Pearson correlations among numeric columns","source":"raw"}</parameter> </invoke>