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     ¸ñʽ£ºgrant [PRIVILEGES]  on [databaseName.tableName] to [userName]@[host] identified by [password] with grant option;
     eg1:  grant select on mysql.user to wqh@localhost
     eg2:GRANT SELECT,INSERT,UPDATE,DELETE,CREATE,DROP ON expenses.* TO custom@whitehouse.gov IDENTIFIED BY 'stupid';


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