Report Parameters
Report parameters allow the user to supply information to the report being executed.
Several types of report parameters are available, all of which include a display name and parameter name.
To use the report parameter within the report simply reference the parameter name within the SQL statement, for example
WHERE ([ItemCore].[Name] LIKE @ServerName)
If the SQL statement of the report contains a parameter that has not been defined as a report parameter an error similar to the following will be displayed to the user