We will find that most of the changes come when we choose if we want (1) all the fields in a document, (2) some of the fields, (3) fields in one or more subdocuments, (4) and a few other possible combinations. Below is a simple example of a JSON document that we convert from and store in the object $converted note how the fields become the object's properties:Īs we can see, extracting API data in PowerShell does not require too much, as this will look similar even if we were to obtain other JSON documents.
Also, keep in mind that if you're using a document oriented database, like MongoDB, you can perform a direct insert and bypass converting data. In order to read JSON into SQL Server, we will need to convert the JSON syntax into a TSQL syntax (some developers may convert the JSON objects into a data table and perform a SQL Bulk Copy) in this case, I use a T-SQL syntax for easy debugging, but other methods are available. Converting FormatsĪfter reading the documentation, we know that we want the West Texas Intermediate in the JSON format.
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This example does not provide a key, so if you want to emulate the example, you can register at FRED to get your free API key. Finally, many APIs, like FRED, will require an API key, and developers often need to register for a key in order to proceed.
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Also, if the API is not well known, this documentation will also provide us with ideas about how to validate before we add the data - we don't want to add anything into our database. In the case ofįRED, we can read its documentation to get a feel for what we'll be extracting, specifically how the data and topics are structured. Always Read the DocumentationĪlways read the API documentation because it will tell you what data are provided, how to access the data, what type of format it will provide, and will sometimes provide an example. The below is a guide to extracting data from an API, in this case usingįRED's West Texas Intermediate and provides an overall guideline of how to do so with other APIs. We can also bypass some tools that may add additional overhead (or loading) to get these data.
Generally, we will get the data in XML or JSON (in some cases, we'll directly parse HTML) and add the data into SQL Server. Yes, we can extract API data using PowerShell similar to how we can extract the same data in C#.
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