When you assignment with ETL and the antecedent book is JSON, abounding abstracts may get nested attributes in the JSON file. Your requirements will generally behest that you abrade those nested attributes. There are abounding agency you can abrade the JSON hierarchy, however; I am action to allotment my adventures with Azure Abstracts Factory (ADF) to abrade JSON.
The ETL action complex demography a JSON antecedent file, flattening it, and autumn in an Azure SQL database. The attributes in the JSON files were nested, which appropriate flattening them. The antecedent JSON looks like this:
The aloft JSON certificate has a nested attribute, Cars. We would like to abrade these ethics that aftermath a final aftereffect attending like below:
How do we do abrade JSON in ADF?
Let’s actualize a action that includes the Archetype activity, which has the capabilities to abrade the JSON attributes. Let’s do that footfall by step.
First, actualize a new ADF Action and add a archetype activity.
Next, we charge datasets. You charge to accept both antecedent and ambition datasets to move abstracts from one abode to another. In this case antecedent is Azure Abstracts Lake Storage (Gen 2). The ambition is Azure SQL database. The beneath amount shows the antecedent dataset. We are application a JSON book in Azure Abstracts Lake.
We will admit abstracts into the ambition afterwards flattening the JSON. the beneath amount shows the bore dataset, which is an Azure SQL Database.
Please agenda that, you will charge Linked Services to actualize both the datasets. This commodity will not go into capacity about Linked Services. If you charge details, you can attending at the Microsoft document.
After you actualize antecedent and ambition dataset, you charge to bang on the mapping, as apparent below. Follow these steps:
Make abiding to accept “Collection Reference”, as mentioned above. If you balloon to accept that again the mapping will attending like the angel below.
If you attending at the mapping carefully from the aloft figure, the nested account in the JSON from antecedent ancillary is: ‘result’][0][‘Cars’][‘make’]. This agency the archetype action will alone booty actual aboriginal almanac from the JSON. If you assassinate the action you will acquisition alone one almanac from the JSON book is amid to the database. So, it’s important to accept Collection Reference.
In summary, I begin the Archetype Action in Azure Abstracts Factory fabricated it accessible to abrade the JSON. You don’t charge to address any custom code, which is air-conditioned cool.
How To Write A Json File – How To Write A Json File
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