Which service is recommended for high volumes of data and complex queries?

Azure Synapse Analytics is the recommended service for handling high volumes of data and complex queries due to its powerful capabilities in data integration, analytics, and big data processing. It is designed to support high-performance querying and large-scale data processing, making it suitable for data warehousing and analytical workloads.

This service combines big data and data warehousing, allowing users to analyze large datasets across multiple data sources with ease. Its ability to scale and perform in an optimized manner enables it to handle complex analytical queries efficiently. Additionally, Azure Synapse Analytics provides features like serverless querying and a variety of integration options, making it an excellent choice for companies needing robust data analytics solutions.

While Azure Data Lake Storage is suited for storing large amounts of unstructured data, and Azure SQL Database is aligned for transactional workloads with structured data, neither offers the same level of performance and analytics capacity for complex queries as Azure Synapse Analytics. Azure Blob Storage, on the other hand, is primarily focused on storing large binary objects and is not optimized for query performance or complex analysis.