_version: "2"
first:
    kind: Dimension
    field: first
last:
    kind: Dimension
    field: last
age:
    kind: Metric
    field: age
date_between:
    kind: Metric
    field: 'if(birth_date between "20 years ago" and "now", age)'
dt_between:
    kind: Metric
    field: 'if(birth_date between "20 years ago" and "now", age)'
