How do you refer to an input parameter in an SQLScript procedure for assignment?

In SQLScript, input parameters are referred to using a specific syntax that denotes their purpose as variables in the context of the procedure. The correct way to refer to an input parameter for assignment is by prefixing the parameter name with a colon. This identification clearly marks the parameter as an input variable that can be used and manipulated within the body of the procedure.

In this case, using the notation of a colon followed by the parameter name allows for assignments and expressions to correctly understand that it is referencing a specific input parameter. This makes the code more readable and maintains clarity regarding which variables are input parameters.

The other options do not follow this designated syntax. Braces and the '@' symbol are not standard for referencing input parameters in SQLScript. Using just the parameter name without any prefix does not indicate that it is an input parameter, which could lead to ambiguities in the code. Thus, the notation that includes a colon is essential for correct referencing and assignment of input parameters in SQLScript procedures.