Should I Always Fully Qualify Column Names In SQL?

Question

Out of interest when working with SQL statements should I always use the fully qualifed column name (tablename.columnname) even if only working with one table e.g.

Answer 1

If you are only selecting from one table I do not see the overall usefulness. If you are selecting from multiple tables, qualifying the column names would certainly make it easier to read for any other developer who may not be familiar with your database schema.