There are two types of identifiers in U-SQL:
- C# Identifiers that follow the C# naming conventions, and
- U-SQL Identifiers that are used to identify objects such as tables or databases or part of objects such as columns or indexes of tables.
Both types of identifiers are always case-sensitive in U-SQL. This means for example that a table name T is going to be different from a table name t and a C# function F is different from a function f.