在 Power BI Desktop 中为数据集中的每一行导入 CSV

Question

我有一个包含地址的数据集。对于每个地址，我都会向地理编码服务发出网络请求。服务的响应是一个包含一行的 CSV 文件。如何将 CSV 中的数据添加到我的原始 table，并为每个地址重复此操作？

这是我的 Power BI 查询（包括创建带地址的数据集）：

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("LY9ba4NAEIX/yuCzD3G9YB6VQKRNoFB6QcnD6E50m81YZldK/311m8c53+E7TNdFrx6ekJ3zgughi+EoMxseiaNL3EXlPkmeW8hVuD7IeZJeDN8giWGf7XII4LR4T9yTjKsIFLQ/s7UU0Bnl5iFJoBKe6B6yd+NQiPUmKVWqXho4kf11HnXglQyTuZMmZxEZihjSvMyg/oQ3LzRMPrQOQnSFFBpEsQ9zuxgNzTqOrL8tGd4mDsRbaQyNWrBH9kH8YPXshinAZAeFUns4Vv9/Vb02X1DA2WhNtl9kdVz+AA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [adres = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"adres", type text}}),
    #"Build URL" = Table.AddColumn(#"Changed Type", "URL", each "https://geodata.nationaalgeoregister.nl/locatieserver/v3/free?fq=type:adres&fl=*&rows=1&wt=csv&q=" & [adres]),
    #"Get Attributes" = Table.AddColumn(#"Build URL", "attrs", each Web.Contents([URL]))
in
    #"Get Attributes"

我设法让它工作切换到 Web 服务的 JSON 响应： https://gist.githubusercontent.com/FrieseWoudloper/68de3449287c9ed43ac4f140d3991e4c/raw/9be21d051e2645ee581d1b9567410b2e49b3c4b5/provinciehuis.txt

但是我很想知道 CSV 响应的解决方案，也用于学习目的。

Answer 1

我添加了将二进制转换为 table 的自定义列，并提升了 headers，然后您可以随意访问所有列我通过钻入其中一个来获得转换二进制文件的代码，它自动创建了我在自定义列

上使用的 Csv.Document 语法

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("LY9ba4NAEIX/yuCzD3G9YB6VQKRNoFB6QcnD6E50m81YZldK/311m8c53+E7TNdFrx6ekJ3zgughi+EoMxseiaNL3EXlPkmeW8hVuD7IeZJeDN8giWGf7XII4LR4T9yTjKsIFLQ/s7UU0Bnl5iFJoBKe6B6yd+NQiPUmKVWqXho4kf11HnXglQyTuZMmZxEZihjSvMyg/oQ3LzRMPrQOQnSFFBpEsQ9zuxgNzTqOrL8tGd4mDsRbaQyNWrBH9kH8YPXshinAZAeFUns4Vv9/Vb02X1DA2WhNtl9kdVz+AA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [adres = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"adres", type text}}),
    #"Build URL" = Table.AddColumn(#"Changed Type", "URL", each "https://geodata.nationaalgeoregister.nl/locatieserver/v3/free?fq=type:adres&fl=*&rows=1&wt=csv&q=" & [adres]),
    #"Get Attributes" = Table.AddColumn(#"Build URL", "attrs", each Web.Contents([URL])),
    #"Added Custom" = Table.AddColumn(#"Get Attributes", "Custom", each Table.PromoteHeaders(Csv.Document([attrs],[Delimiter=",", Encoding=65001, QuoteStyle=QuoteStyle.None]))),
    #"Removed Columns" = Table.RemoveColumns(#"Added Custom",{"attrs"}),
    #"Expanded Custom" = Table.ExpandTableColumn(#"Removed Columns", "Custom", {"bron", "woonplaatscode", "type", "woonplaatsnaam", "wijkcode", "huis_nlt", "openbareruimtetype", "buurtnaam", "gemeentecode", "rdf_seealso", "weergavenaam", "suggest", "straatnaam_verkort", "id", "gekoppeld_perceel", "gemeentenaam", "buurtcode", "wijknaam", "identificatie", "openbareruimte_id", "waterschapsnaam", "provinciecode", "postcode", "provincienaam", "centroide_ll", "geometrie_ll", "nummeraanduiding_id", "waterschapscode", "adresseerbaarobject_id", "huisnummer", "provincieafkorting", "geometrie_rd", "centroide_rd", "straatnaam"}, {"Custom.bron", "Custom.woonplaatscode", "Custom.type", "Custom.woonplaatsnaam", "Custom.wijkcode", "Custom.huis_nlt", "Custom.openbareruimtetype", "Custom.buurtnaam", "Custom.gemeentecode", "Custom.rdf_seealso", "Custom.weergavenaam", "Custom.suggest", "Custom.straatnaam_verkort", "Custom.id", "Custom.gekoppeld_perceel", "Custom.gemeentenaam", "Custom.buurtcode", "Custom.wijknaam", "Custom.identificatie", "Custom.openbareruimte_id", "Custom.waterschapsnaam", "Custom.provinciecode", "Custom.postcode", "Custom.provincienaam", "Custom.centroide_ll", "Custom.geometrie_ll", "Custom.nummeraanduiding_id", "Custom.waterschapscode", "Custom.adresseerbaarobject_id", "Custom.huisnummer", "Custom.provincieafkorting", "Custom.geometrie_rd", "Custom.centroide_rd", "Custom.straatnaam"})
in
    #"Expanded Custom"

在 Power BI Desktop 中为数据集中的每一行导入 CSV

Import CSV for every row in a dataset in Power BI Desktop

powerbi-desktop