Change posts in wordpress to status pending


I am a rookie mySQL / wordpress programmer. I can get to phpmyadmin and type in a sql command. But want to do right thing.  

What I want is to make all records/posts before 1/1/2011 archived or pending so they do not show and people can not link directly to them,  There are 1000's so doing it manually is out of question,  I may want to retrieve some later so I do not want to delete them.

Could someone give me a sql statement to do this?

Charles BaldoSoftware DeveloperAsked:
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Erdinç Güngör ÇorbacıPHP Development Team LeaderCommented:
The query below does the trick as you wish. But i don't take any responsibility and strongly advise you to back your db up.

This will set all posts before march 2011 to state "pending"

UPDATE wp_posts SET post_status='pending' WHERE DATE_FORMAT(post_date,'%Y-%m-%d')<'2011-03-01' ;

to retrieve them back
UPDATE wp_posts SET post_status='publish' WHERE DATE_FORMAT(post_date,'%Y-%m-%d')<'2011-03-01' ;

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Charles BaldoSoftware DeveloperAuthor Commented:
Thank You, did backup
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