What happens to the permalink that use %postname% if I change the post name

After the page is published WordPress creates a URL link based on your permalink settings. If you then change the post name the url link would not change automatically, although you can manually change it in the post.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)