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Anonymous's avatar
Anonymous
Not applicable
7 years ago
Solved

Historical exchange rate API

Hi,   I am looking for a way to get historical exchange rates into my report - also daily updated rates - and I have been looking at ecb.europa.eu and their rest API, but find it difficult;  does ...
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  • Anonymous's avatar
    Anonymous
    7 years ago

    Anonymous I would suggest first creating a table with sequential dates on each row. Then by invoking the function, it will send the dates to the function one by one thus returning the exchange rate info for each day. You can use this example which first generates a list of dates of the past 365 days (this is updated with every refresh) and invokes the function:

     

    let
    Source = {Number.From(Date.AddDays(DateTime.Date(DateTime.LocalNow()),-365))..Number.From(DateTime.Date(DateTime.LocalNow()))},
    #"Converted to Table" = Table.FromList(Source, Splitter.SplitByNothing(), null, null, ExtraValues.Error),
    #"Changed Type" = Table.TransformColumnTypes(#"Converted to Table",{{"Column1", type date}}),
    #"Renamed Columns" = Table.RenameColumns(#"Changed Type",{{"Column1", "Date"}}),
    #"Invoked Custom Function" = Table.AddColumn(#"Renamed Columns", "ExchangeRates", each Fn_GetHistoricExchangeRates(Date.ToText([Date],"yyyy-MM-dd"))),
    #"Expanded ExchangeRates" = Table.ExpandTableColumn(#"Invoked Custom Function", "ExchangeRates", {"Currency", "Rate"}, {"Currency", "Rate"}),
    #"Changed Type1" = Table.TransformColumnTypes(#"Expanded ExchangeRates",{{"Rate", type number}, {"Currency", type text}})
in
    #"Changed Type1"

    In order for it to work you should create a function named Fn_GetHistoricExchangeRates, by using the code in my previous post.

     

    Hope that helps!


    Jan

Anonymous's avatar
Anonymous
Not applicable
7 years ago

Anonymous I have recently created a simple function that extracts exchange rate information from the site https://exchangeratesapi.io/ which gets its data from the ECB site:

let
    Source = (Date as text) => let
        Source = Json.Document(Web.Contents("https://api.exchangeratesapi.io/" & Date & "?base=USD")),
        rates = Source[rates],
        #"Converted to Table" = Record.ToTable(rates),
        #"Renamed Columns" = Table.RenameColumns(#"Converted to Table",{{"Name", "Currency"}, {"Value", "Rate"}})
    in
        #"Renamed Columns"
in
    Source

Using a datetable or generated range of dates, you can then invoke the custom function like this:

= Table.AddColumn(#"Removed Other Columns", "Rates", each Fn_GetHistoricCurrencyRates(DateTime.ToText([Date],"yyyy-MM-dd")))

Hope that helps!

 

Jan

adude's avatar
adude
Frequent Visitor
3 years ago

Hi, I am new to Power BI, I have followed all the steps you have mentioned in the thread, but I am stuck, how do I add api key to the code so I can get the data? 

Also, I am kind of confused about the Fn_GetHistoricExchangeRates part, how do I create this function so I can get it to work with the date table?

I would really appreciate your help