When You decide to reorganize the blog link URL to make it tidier or to reflect new focus or theme of the blog. If you decide to change the URL or link location of your WordPress blog due to changing of domain name (such as from http://www.old-domain.com/ to http://www.new-domain.com/) or the blog to another directory location (such as from http://www.domain.com/ to http://www.domain.com/blog/), there are some steps that should be done to ensure the proper migration and no breaking links.
The tricky part when moving WordPress blog to another location is that WordPress is using absolute path in URL link instead of relative path in URL link location when stores some parameters in database. Within blog posts’ contents itself, users may also use the old URLs when creating reference backlinks. All these values in the database will need to be changed when WordPress is moved. The following guide will show you which database fields that has references or values related to blog’s URLs that you want to modify. Note that this guide is not about how to move WordPress blog from one server or host to another new hosting service.