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

I think it is a good idea to always use the fully qualified column name. Use an alias if the table name is too long. It also prepares your queries for futures additions of e.g. joins.