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9 Ιουν 2011 · delete from YourTable where YourTable.columnA in (select columnA from YourTable group by column A having count(*) > 1)
The primary function of the MySQL privilege system is to authenticate a user who connects from a given host and to associate that user with privileges on a database such as SELECT, INSERT, UPDATE, and DELETE. Additional functionality includes the ability to grant privileges for administrative operations.
2 Αυγ 2010 · The primary function of the MySQL privilege system is to authenticate a user who connects from a given host and to associate that user with privileges on a database such as SELECT, INSERT, UPDATE, and DELETE. Additional functionality includes the ability to grant privileges for administrative operations.
16 Αυγ 2011 · You can use the data in mysql.* and information_schema.* to find/delete users. But be very careful doing so - there's lots of non-user-related data in there and deleting the wrong record(s) can kill your database.
16 Απρ 2024 · Deleting a MySQL user removes the user's account and the associated grant table privileges. Only admins with global CREATE USER or DELETE privileges can remove another user from MySQL. In this tutorial, learn how to remove one or more MySQL user accounts using the DROP USER statement.
18 Δεκ 2023 · Here’s a quick reference cheat sheet for MySQL access control commands: Create a new user. CREATE USER 'username'@'localhost' IDENTIFIED BY 'password'; Grant privileges to a user. GRANT SELECT, INSERT, UPDATE ON database.table TO 'username'@'localhost'; Revoke privileges from a user. REVOKE DELETE ON database.* FROM 'username'@'localhost';
4 Απρ 2021 · DELETE t1 FROM data t1 JOIN data t2 USING (channel_id,timestamp) WHERE t1.id > t2.id
