Can a SELECT statement include multiple expressions for column creation?

In SAS, a SELECT statement can indeed include multiple expressions for column creation. This provides flexibility in data manipulation and allows for the calculation and transformation of various data elements simultaneously within a single query. By using multiple expressions, users can define calculated fields, apply functions, and perform aggregations all at once.

When employing multiple expressions, each can be assigned to a new column through the use of AS to create an alias for clarity. This means that within one SELECT statement, you can construct various new columns based on different expressions without the need to execute separate queries.

The option suggesting that expressions must all be qualified or that they can only be used with aliases does not accurately represent the capabilities of the SELECT statement. Multiple expressions do not require qualification in the way implied, as they can simply exist together in the SELECT clause as long as they are correctly formatted.