name: ads
table: ads
grain:
- ad_id
columns:
- name: ad_id
  type: number
- name: ad_group_id
  type: number
- name: created_at
  type: time
  role: time
- name: name
  type: string
- name: status
  type: string
joins:
- to: ad_groups
  'on': ad_group_id = ad_groups.ad_group_id
  relationship: many_to_one