Question

I am porting client DB to new one with different post titles and rows ID’s , but he wants to keep the hits from old website,

he has over 500 articles in new DB , and updating one is not an issue with this query

UPDATE blog_posts 
SET hits=8523 WHERE title LIKE '%slim charger%' AND category = 2

but how would I go by doing this for all 500 articles with 1 query ? I already have export query from old db with post title and hits so we could find the new ones easier

INSERT INTO `news_items` (`title`, `hits`) VALUES
('Slim charger- your new friend', 8523 )...

the only reference in both tables is product name word within the title everything else is different , id , full title …

Answer 1

Make a tmp table for old data in old_posts

UPDATE new_posts LEFT JOIN old_posts ON new_posts.title = old_posts.title SET new_posts.hits = old_posts.hits;