how to change wordpress url and site url code example

Example 1: 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');

Example 2: update url wordpress

<?php
update_option( 'siteurl', 'http://example.com' );
update_option( 'home', 'http://example.com' );