why set up wordpress url in db developer code example

Example 1: wordpress change url in database

UPDATE wp_options SET option_value = replace(option_value, 'http://www.oldurl', 'http://www.newurl') WHERE option_name = 'home' OR option_name = 'siteurl';

UPDATE wp_posts SET guid = replace(guid, 'http://www.oldurl','http://www.newurl');

UPDATE wp_posts SET post_content = replace(post_content, 'http://www.oldurl', 'http://www.newurl');

UPDATE wp_postmeta SET meta_value = replace(meta_value,'http://www.oldurl','http://www.newurl');

Example 2: wordpress sql change site url

# Check your table prefix
# Change all the tables 

UPDATE wp_options SET option_value = 
replace(option_value, 'oldurl.com', 'newurl.com') WHERE option_name = 'home' 
OR option_name = 'siteurl';UPDATE wp_posts SET guid = 
replace(guid, 'oldurl.com','newurl.com');
UPDATE wp_posts SET post_content = replace(post_content, 'oldurl.com', 'newurl.com');

UPDATE wp_postmeta SET meta_value = replace(meta_value,'oldurl.com','newurl.com');