How to change all the guid in posts table?

I had forgotten that I wrote a SQL generator a few years back for this precise task:

https://farinspace.github.io/wp-migrate-gen/

Essentially the relevant SQL is as follows:

UPDATE `wp_options` SET `option_value` = REPLACE(`option_value`, 'a', 'b') WHERE `option_value` NOT REGEXP '^([adObis]:|N;)';
UPDATE `wp_posts` SET `post_content` = REPLACE(`post_content`, 'a', 'b');
UPDATE `wp_posts` SET `post_excerpt` = REPLACE(`post_excerpt`, 'a', 'b');
UPDATE `wp_posts` SET `guid` = REPLACE(`guid`, 'a', 'b');
UPDATE `wp_comments` SET `comment_author_url` = REPLACE(`comment_author_url`, 'a', 'b');
UPDATE `wp_comments` SET `comment_content` = REPLACE(`comment_content`, 'a', 'b');
UPDATE `wp_links` SET `link_url` = REPLACE(`link_url`, 'a', 'b');
UPDATE `wp_postmeta` SET `meta_value` = REPLACE(`meta_value`, 'a', 'b') WHERE `meta_value` NOT REGEXP '^([adObis]:|N;)';
UPDATE `wp_usermeta` SET `meta_value` = REPLACE(`meta_value`, 'a', 'b') WHERE `meta_value` NOT REGEXP '^([adObis]:|N;)';
UPDATE `wp_termmeta` SET `meta_value` = REPLACE(`meta_value`, 'a', 'b') WHERE `meta_value` NOT REGEXP '^([adObis]:|N;)';
UPDATE `wp_commentmeta` SET `meta_value` = REPLACE(`meta_value`, 'a', 'b') WHERE `meta_value` NOT REGEXP '^([adObis]:|N;)';

The queries above will check for and skip PHP serialized data.

Using the generator, you can turn off "skip serialized data" if the old and new string lengths match.

WARNING: I would recommend that you always create a backup of your data before running any queries that add/remove/update content.

WordPress documentation warns about changing guid entries in the WP database: "It is critical that you do NOT change the contents of this field."

https://wordpress.org/support/article/changing-the-site-url/#important-guid-note

To improve the previous answers you should update all relevant tables such as (here table prefix is wp_):

UPDATE `wp_posts` SET guid = REPLACE(guid, 'oldsiteurl', 'newsiteurl') WHERE guid LIKE 'oldsiteurl%';

UPDATE `wp_postmeta` SET meta_value = REPLACE(meta_value, 'oldsiteurl', 'newsiteurl') WHERE meta_value LIKE 'oldsiteurl%';

UPDATE `wp_options` SET option_value = REPLACE(option_value, 'oldsiteurl', 'newsiteurl') WHERE option_value LIKE 'oldsiteurl%';

If you got any plugins that do redirections you should also change the permalinks there:

UPDATE `wp_redirection_404` SET url = REPLACE(url, 'oldsiteurl', 'newsiteurl') WHERE url LIKE 'oldsiteurl%';

It should be something like:

UPDATE wp_posts SET guid = REPLACE(guid, 'oldurl.com', 'newurl.com') WHERE guid LIKE 'http://oldurl.com/%';

• oldurl.com - Previous URL shown in wordpress settings > general options
• newurl.com - New URL

As you mentioned, there are a few variables that need to be changed in order for you to update to the new URL on your WordPress site.

1. Go and download Interconnect IT's Database Search & Replace Script here
2. Unzip the file and drop the folder in your live server where your WordPress is installed (the root) and rename the folder to replace (screenshot)
3. Navigate to the new folder you created in your browser (ex: http://web.site/replace) and you will see the search/replace tool
4. It should be pretty self-explanatory up to this point: enter your old URL in the search for… field and the new URL in the replace with… field

You can click the dry run button under actions to see what it will be replacing before you execute the script. Once you're done be sure to remove the /replace/ folder.

Use the WP-CLI to search and replace. The plugin MigrateDB also has a find and replace on export for the next time you transition.