Power BI Connector for XML

Build 23.0.8791

リレーショナルモデル

The CData Power BI Connector for XML can be configured to create a relational model of the data in the XML file or source, treating each XPath as an individual table containing a primary key and a foreign key that links to the parent document.This is particularly useful if you need to work with your XML data in existing BI, reporting, and ETL tools that expect a relational data model.

Joining Nested Arrays as Tables

With DataModel set to "Relational", any JOINs are controlled by the query.Any time you perform a JOIN query, the XML file or source will be queried once for each table included in the query.

Below is a sample query against the sample document in Raw データ, using a relational model based on the XML paths "/root/people", "/root/people/vehicles", and "/root/people/vehicles/maintenance".

接続文字列

DataModel 接続プロパティを"Relational" に設定しXPath 接続プロパティを"/root/people;/root/people/vehicles;/root/people/vehicles/maintenance;" に設定して、次のクエリを実行してサンプル結果セットを表示します。

URI=C:\people.txt;DataModel=Relational;XPath='/root/people;/root/people/vehicles;/root/people/vehicles/maintenance;'

クエリ

The following query explicitly JOINs the people, vehicles, and maintenance tables.

SELECT 
  [people].[personal.age] AS age, 
  [people].[personal.gender] AS gender, 
  [people].[personal.name.first] AS first_name, 
  [people].[personal.name.last] AS last_name, 
  [people].[source], 
  [vehicles].[type], 
  [vehicles].[model], 
  [vehicles].[insurance.company] AS ins_company, 
  [vehicles].[insurance.policy_num] AS ins_policy_num, 
  [maintenance].[date] AS maint_date, 
  [maintenance].[desc] AS maint_desc
FROM 
  [people]
JOIN 
  [vehicles] 
ON 
  [people].[_id] = [vehicles].[people_id]
JOIN 
  [maintenance] 
ON 
  [vehicles].[_id] = [maintenance].[vehicles_id]

結果

In the example query, each maintenance element is JOINed to its parent vehicle element, which is JOINed to its parent people element to produce a table with 8 rows (2 maintenance entries for each of 2 vehicles each for 2 people).

agegenderfirst_namelast_namesourcetypemodelins_companyins_policy_nummaint_datemaint_desc
20MJohnDoeinternetcarHonda CivicABC Insurance123452017-07-17oil change
20MJohnDoeinternetcarHonda CivicABC Insurance123452018-01-03new tires
20MJohnDoeinternettruckDodge RamABC Insurance123452017-08-27new tires
20MJohnDoeinternettruckDodge RamABC Insurance123452018-01-08oil change
24FJaneRobertsphonecarToyota CamryCar Insurance987652017-05-11tires rotated
24FJaneRobertsphonecarToyota CamryCar Insurance987652017-11-03oil change
24FJaneRobertsphonecarHonda AccordCar Insurance987652017-10-07new air filter
24FJaneRobertsphonecarHonda AccordCar Insurance987652018-01-13new brakes

関連項目

  • 自動スキーマ検出:テーブルスキーマに報告されたカラムを設定します。
  • フリーフォームクエリ:ドット表記を使用して、ネストされたデータを選択します。
  • 垂直フラット化:ネストされたデータを別々のテーブルとしてクエリします。
  • XML 関数:クライアント側の集計と変換を実行するために返されたデータを操作します。

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Build 23.0.8791