trailing_observation_count

How many valid observations the matching trailing_median() actually saw.

How many valid observations the matching trailing_median() actually saw. Ship it beside every trailing_median in a model that feeds the ML contract: it is what makes that median’s NULLs and its early-window instability visible to a consumer instead of silent.

Signature

{{ trailing_observation_count(value_col, partition_by, order_by, lookback=none, frame='rows', valid_condition=none) }}

Returns

scalar expression composable in a SELECT list.