{
  "language": "sql",
  "formula": "SELECT coalesce(Amount, 0) AS result FROM input ORDER BY Period",
  "dataset": [
    {
      "Region": "North",
      "Amount": 10,
      "Label": "North-one",
      "Period": 1
    },
    {
      "Region": "North",
      "Amount": 20,
      "Label": "North-two",
      "Period": 2
    },
    {
      "Region": "South",
      "Amount": null,
      "Label": "South-one",
      "Period": 3
    },
    {
      "Region": "South",
      "Amount": 5,
      "Label": "South-two",
      "Period": 4
    }
  ],
  "types": {
    "Region": "string",
    "Amount": "float",
    "Label": "string",
    "Period": "integer"
  },
  "expected_rows": [
    [
      10
    ],
    [
      20
    ],
    [
      0
    ],
    [
      5
    ]
  ],
  "checked_on": "2026-10-27",
  "proof_scope": "xmetric browser engine on the stated sample and an independent own-CSV fixture; not native vendor or corpus parity"
}