| 回测 | 历史周期复算 |
|---|---|
| 交叉 | 相近指标对比 |
| 边界 | 月初/月末/闰年 |
交叉验证
交叉验证
-- 支付金额 vs 订单-退款推导值差异
SELECT a.v AS pay_amt, b.v AS derived_amt, a.v - b.v AS diff
FROM metric_value a
JOIN metric_value b ON b.metric_code = 'DERIVED_PAY'
WHERE a.metric_code = 'PAY_AMT' AND a.dt = '2026-10-12';验收发现的问题与修正过程记录在指标档案，供后续复盘。