Help mysql query to change post/thread owner

[postcd]

Hello,

i have two users who posted topics where they mention phrasse: news.google.com

my aim is either delete such posts (but it seems to be too complicated as you can see there) or to change these topics/posts owner/user using mysql query.

SELECT * FROM `post` WHERE `pagetext` LIKE '%news.google.com%'

it found 2 users which have matching posts:

username: username1, username2
userid: 479, 0
pagetext: %news.google.com%

(username2 had userid 308 before i wrongly removed his account, keeping his posts)

SELECT * FROM `thread` WHERE `postusername` LIKE 'username1' AND `postuserid` LIKE '308' AND `replycount` LIKE '0' AND `notes` LIKE 'Imported thread'

This found posts i want to attribute to different user with id example: 308.

So as a total mysql noob, i tried:

UPDATE `thread` SET `postuserid` = '308' WHERE `postusername` LIKE 'username2' AND `postuserid` LIKE '308' AND `replycount` LIKE '0' AND `notes` LIKE 'Imported thread'

but is wrong. Can you please help with right mysql query/ies to change user id of the topics/posts that contain phrasse news.google.com? Thank you