[sqlite] The correct way to use the utf encoding?

[hubdog]

Now I  want to use store and read utf string in sqlite3.
Now , I need encode my text in utf8 and pass them as insert sql to a 
utf8 encoding sqlite database and
then I query the database to get the string inserted previously and 
manully decode the string from utf8 to ansi to display them.
Now it looks like the encoding and decoding work all done by myself. So 
I confused that what is meaning with
the utf8 encoding sqlite database, what is role of sqlite database in 
processing the utf string?