Answer as in image below.

Event-driven architecture (EDA) is a common data integration pattern that involves production, detection, consumption, and reaction to events. Data integration scenarios often require Data Factory customers to trigger pipelines based on events happening in storage account, such as the arrival or deletion of a file in Azure Blob Storage account. Data Factory natively integrates with Azure Event Grid, which lets you trigger pipelines on such events.
Reference:
https://docs.microsoft.com/en-us/azure/data-factory/how-to-create-event-trigger

A shared access signature (SAS) provides secure delegated access to resources in your storage account. With a SAS, you have granular control over how a client can access your data. For example:
What resources the client may access.
What permissions they have to those resources.
How long the SAS is valid.
Note: Data Lake Storage Gen2 supports the following authorization mechanisms:
Shared Key authorization
Shared access signature (SAS) authorization
Role-based access control (Azure RBAC)
Access control lists (ACL) Data Lake Storage Gen2 supports the following authorization mechanisms:
Shared Key authorization
Shared access signature (SAS) authorization
Role-based access control (Azure RBAC)
Access control lists (ACL)
Reference:
https://docs.microsoft.com/en-us/azure/storage/common/storage-sas-overview

Reference:
https://docs.microsoft.com/en-us/azure/azure-sql/database/configure-max-degree-of-parallelism

Azure SQL Database single database supports Data Sync.
Reference:
https://docs.microsoft.com/en-us/azure/azure-sql/database/features-comparison