如何根据 JSON 的 Power Query 中的值指定数组元素

Question

我有一个 JSON 嵌套数组源。每个对象都有一个“键”元素。我想要 select Key="canada" 的元素。我将如何指定它？

什么有效：

let
    Source = Json.Document(Web.Contents("https://kustom.radio-canada.ca/covid-19")),
    Source1 = Source{22},

但它被硬编码为第 22 个值。

什么不起作用：

    Source1 = Source{[Key="canada"]}

这个returns:

Expression.Error: We cannot convert a value of type Record to type Number.
Details:
    Value=
        Key=canada
    Type=[Type]

那么，我该如何指定呢？

Answer 1

试试这个

let
    Source = Json.Document(Web.Contents("https://kustom.radio-canada.ca/covid-19")),
    #"Converted to Table" = Table.FromList(Source, Splitter.SplitByNothing(), null, null, ExtraValues.Error),
    #"Expanded Column1" = Table.ExpandRecordColumn(#"Converted to Table", "Column1", {"Key", "Api", "Name", "NameFr", "Country", "CountryFr", "State", "StateFr", "Lat", "Long", "Confirmed", "Deaths", "Recovered", "Population", "History", "Regions", "DateUpdate"}, {"Key", "Api", "Name", "NameFr", "Country", "CountryFr", "State", "StateFr", "Lat", "Long", "Confirmed", "Deaths", "Recovered", "Population", "History", "Regions", "DateUpdate"}),
    #"Filtered Rows" = Table.SelectRows(#"Expanded Column1", each ([Key] = "canada"))
in
    #"Filtered Rows"

如何根据 JSON 的 Power Query 中的值指定数组元素

How to specify array element based on a value in Power Query for JSON

excel

m

powerquery