![]() The language automatically scales queries to employ available system resources, letting users focus on querying data instead of attending to infrastructure needs or writing what Microsoft calls "plumbing code."Īs a component of Microsoft's Azure Data Lake platform, U-SQL is the built-in language for analyzing data sets in the Azure Data Lake Store, which is paired with the analytics service to provide a data lake environment in the cloud. Microsoft says U-SQL allows users to process any type of data, and at any scale. However, U-SQL doesn't fully adhere to ANSI SQL for example, commands such as SELECT must be written in uppercase letters, and C# syntax is used for expressions inside of commands. U-SQL's metadata system, SQL syntax and language semantics are modeled on standard ANSI SQL and Transact-SQL ( T-SQL), Microsoft's implementation of the query language for its SQL Server database. The integration between SQL and C# in U-SQL is based on SCOPE, as is U-SQL's query execution and optimization framework. In a 2008 research paper, the company said it developed SCOPE - short for Structured Computations Optimized for Parallel Execution - to enable data analysts familiar with SQL to query search logs, internet clickstreams and other massive data sets that increasingly were being stored in distributed platforms like Hadoop instead of SQL-based relational databases. U-SQL has its roots in a declarative and extensible scripting language called SCOPE that Microsoft uses internally. U-SQL was designed to unify the two approaches by building native extensibility for user-written C# code into a SQL implementation. The company integrated them to create U-SQL in response to the emergence of big data systems, which often store unstructured data that can pose different challenges for SQL and procedural programming languages. SQL is the standard language for querying relational databases, while C# (pronounced "C-sharp") is a programming language developed by Microsoft. Introduced in 2015, U-SQL is part of Microsoft's Azure Data Lake Analytics cloud service, but it lets users run queries against multiple data stores in the Azure cloud. ![]() U-SQL is a Microsoft query language that combines a declarative SQL-like syntax with C# programming, enabling it to be used to process both structured and unstructured data in big data environments.
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