Question:What are the purposes of GRANT and REVOKE commands?
Answer The GRANT and REVOKE commands are used to manage access privileges. GRANT command needs to assign new privileges to a user or group of users whereas the REVOKE command is responsible for deleting previously granted privileges from user or group of users.
example:
mysql> GRANT select,insert ON library.book TO jone@localhost IDENTIFIED BY 'open123';
mysql> REVOKE insert ON library.book TO jone@localhost;
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