Topic: External Table Read Data From File Blob Storage in Kusto Query
In this article, we are going to learn about the Eeternaldata operator. The externaldata operator returns a table whose schema is defined in the query itself, and whose data is read from an external storage artifact, such as a blob in Azure Blob Storage or a file in Azure Data Lake Storage. Kusto Query Language is a powerful tool to explore your data and discover patterns, identify anomalies and outliers, create statistical modeling, and more.
// externaldata operator : The externaldata operator returns a table whose schema is defined in the query itself,
//and whose data is read from an external storage artifact, such as a blob in Azure Blob Storage or a file in Azure Data Lake Storage.
//Sample Code
externaldata (UserID:string) [
@"https://storageaccount.blob.core.windows.net/storagecontainer/users.txt"
h@"?...SAS..." // Secret token needed to access the blob
]
//Generate SAS for File in Blob Storage
externaldata (Id:int,FName:string,LName:string) [
@"https://ashahzadblobstorage.blob.core.windows.net/input/Customer.txt"
h@"?sp=r&st=2021-11-26T18:08:41Z&se=2021-11-27T02:08:41Z&spr=https&sv=2020-08-04&sr=b&sig=zwx8IKwChrcCNwVi73fGrn29nXHlAbAfSz%2FAJHaYGwE%3D" // Secret token needed to access the blob
]
with (ignoreFirstRecord=true)
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