I am starting a project involving a small database and I am considering to use SQLite. If I create a table and I defined one of the columns as text, but all the values stor
No, there is no "quick" way to do this with SQLite. Not like you can with MySQL. You will have to drop the table, then re-add it.
Another thing to keep in mind is that SQLite is pretty flexible about the type of data that you can put into each section. Here is a link that describes the datatypes, and how they work: http://www.sqlite.org/datatype3.html
Another option might be to use MySQL if the feature you are speaking of is a big deal to you. It's still free and is great for small projects.