How can I reorder rows in sql database

Question

Is it possible to reorder rows in SQL database? For example; how can I swap the order of 2nd row and 3rd row\'s values?

The order of the row is important to me since

Answer 1

As others have stated use an order by.
Never depend on the order data exists in a physical table, always base it of the data you are working with, be it one or more key fields.