Yes. You can use the column alias in the ORDER BY instead of WHERE clause for sorting.

No, it is not possible to sort a column using a column alias directly in SQL. Column aliases are typically used for renaming columns or for creating more readable output in the result set, but they cannot be used in the ORDER BY clause.

When sorting data in SQL using the ORDER BY clause, you need to reference the actual column name, not its alias. The ORDER BY clause operates on the columns specified in the SELECT statement, and aliases are only recognized in the output, not in other parts of the query.

Here’s an example:

SELECT column_name AS alias_name

FROM your_table

ORDER BY column_name; -- Correct

— Incorrect, this will result in an error
SELECT column_name AS alias_name
FROM your_table
ORDER BY alias_name;

In the incorrect example, using the alias in the ORDER BY clause would result in an error. You should use the actual column name (column_name) in the ORDER BY clause.