​
FIRST(<table>.<column>, <start>, <end>, <unit>)

​
Description

Calculates the first value within the specified time range in the specified <table>.<column> column starting from <start> days to <end> days. When used in the target field, the time period should be positive (in the future). When used in a temporal filter field, the time period should be negative (in the past). This operator can be applied to any columns except the ones which are foreign keys.

​
Example

FIRST(LOAN.AMOUNT, 0, 30)

​
Training Considerations

  • Kumo runs your pQuery over many historic slices of data and across all entities that meet your filter criteria to generate training examples.
  • If for a given entity and historic data slice there are no fact rows to aggregate over, this training example will be dropped. Thus, the operator makes the implicit assumption that for every entity a prediction is generated for, the user is assuming that the entity has at least one fact row in the prediction horizon.
  • For all aggregations, the start time is excluded from the calculation and the end time is included in the calculation.
  • The units for the start and end times is days by default but can be specified as months or hours. If you would like to predict periods with no interactions, you may use the IS NULL or IS NOT NULL operators.