User-provided assemblies

Referencing assemblies in the U-SQL Catalog

CREATE ASSEMBLY MyDB.OrdersLibAsm
  FROM @"/DLLs/OrdersLib.dll";

Below is the standard syntax for referencing an assembly that is in the U-SQL catalog.

REFERENCE SYSTEM ASSEMBLY [DBName].[AssemblyName];

Simplifying code with the USING statement

Similar, to C#'s using statement, U-SQL lets you provide an alias for a namespace, this improve the readability of your code.

USING Exc = System.Exceptions;