Azure provides our an example about loading backup files from Azure Blob storage into Azure SQL Database. You can try to use this script:
CREATE DATABASE SCOPED CREDENTIAL MyAzureBlobStorageCredential
WITH IDENTITY = 'SHARED ACCESS SIGNATURE',
SECRET = '******srt=sco&sp=rwac&se=2017-02-01T00:55:34Z&st=2016-12-29T16:55:34Z***************';
-- NOTE: Make sure that you don't have a leading ? in SAS token, and
-- that you have at least read permission on the object that should be loaded srt=o&sp=r, and
-- that expiration period is valid (all dates are in UTC time)
CREATE EXTERNAL DATA SOURCE MyAzureBlobStorage
WITH ( TYPE = BLOB_STORAGE,
LOCATION = 'https://****************.blob.core.windows.net/invoices',
CREDENTIAL= MyAzureBlobStorageCredential --> CREDENTIAL is not required if a blob has public access!
);
BULK INSERT Sales.Invoices
FROM 'inv-2017-12-08.csv'
WITH (DATA_SOURCE = 'MyAzureBlobStorage');
Reference:Loading files from Azure Blob storage into Azure SQL Database
Hope this can helps you.