What can a variable be used for?

A variable in the context of SAP HANA can indeed be used for filtering data within a query. By utilizing variables, you enable dynamic selection criteria that can enhance the versatility and interactivity of data reports and queries. When you define a variable in a HANA SQL statement, it acts as a placeholder for a value that can be substituted at runtime. This allows users to filter results based on specific parameters that they provide without altering the underlying code, making it highly effective for creating user-specific reports and analyses.

In contrast, while calling a procedure in SQL Script, creating calculated column expressions, and performing currency conversion are important functionalities within SAP HANA, they are distinct processes that do not directly involve the use of a variable in the same primary role as filtering. Variables primarily serve to allow users to define the conditions of their queries, which is crucial for data retrieval and manipulation.