How to change admin password in the table of the mysql database?

Guys,

You can use following command to do the same :

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update agb_book_auth set password=MD5("newwpass") where username="admin";
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Where table agb_book_auth contains admin and password attributes.

OR :

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update wp_users set user_pass = 'b15a2021cb835426552c5d8599d5c7ab' where user_login = 'admin';
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Then execute : flush privileges;

Try :)