{
  "name": "week",
  "type": "function",
  "groups": ["Date and Time"],
  "description": "Extracts the week number from a date, or the number of weeks from an interval.",
  "variants": [{
    "variant": "Date variant",
    "variant_description": "Extracts the week number from a date or datetime.",
    "arguments": [{
      "arg": "date",
      "description": "a date or datetime value"
    }],
    "examples": [{
      "expression": "week('2012-05-12')",
      "returns": "19"
    }]
  }, {
    "variant": "Interval variant",
    "variant_description": "Calculates the length in weeks of an interval.",
    "arguments": [{
      "arg": "interval",
      "description": "interval value to return number of months from"
    }],
    "examples": [{
      "expression": "week(to_interval('3 weeks'))",
      "returns": "3"
    }, {
      "expression": "week(age('2012-01-01','2010-01-01'))",
      "returns": "104.285"
    }]
  }],
  "tags": ["weeks", "week", "date", "extracts", "interval", "number"]
}