/* update all post permalinks */
 update wp_posts
 set guid = REPLACE(guid, 'http://www.oldsite.com', 'http://www.newsite.com')
 where guid LIKE '%http://www.oldsite.com%';
 
/* update all post content */
 update wp_posts
 SET post_content = REPLACE(post_content, 'http://www.oldsite.com', 'http://www.newsite.com')
 where post_content LIKE '%http://www.oldsite.com%';
 
/* update all post meta */
 update wp_postmeta
 SET meta_value = REPLACE(meta_value, 'http://www.oldsite.com', 'http://www.newsite.com')
 where meta_value LIKE '%http://www.oldsite.com%';
 
/* update all options */
 update wp_options
 set option_value = REPLACE(option_value, 'http://www.oldsite.com', 'http://www.newsite.com')
 where option_value LIKE '%http://www.oldsite.com%';