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28 Φεβ 2009 · This worked for me: GRANT USAGE ON *.*. TO 'username'@'localhost'; DROP USER 'username'@'localhost'; This creates the user if it doesn't already exist (and grants it a harmless privilege), then deletes it either way. Found solution here: http://bugs.mysql.com/bug.php?id=19166.
In MySQL 5.7.8+, you can use the IF EXISTS clause to conditionally drop a user only if it exists: DROP USER [ IF EXISTS ] account_name [,account_name2]...; Code language: SQL (Structured Query Language) ( sql )
DROP USER [IF EXISTS] user [, user] ... The DROP USER statement removes one or more MySQL accounts and their privileges. It removes privilege rows for the account from all grant tables.
10 Σεπ 2024 · DROP FUNCTION : This statement could be used to remove an existing user-defined function. Syntax : DROP FUNCTION [ IF EXISTS ] schema_name.function_name; Example - Let's consider Geeks is the function you want to delete then use the following syntax as follows. DROP FUNCTION Geeks; To drop more than one user-defined functions, use below syntax : DR
6 Φεβ 2022 · DROP USER IF EXISTS username; Code language: SQL (Structured Query Language) (sql) The IF EXISTS clause will not show an error, but a warning will display. Removing a User using DROP USER statement will also remove all the privileges of that user from all grant tables. MySQL DROP USER Example
16 Ιουν 2010 · MySQL lacks DROP USER IF EXISTS construct. A good workaround is to grant a harmless privilege to the user before dropping it. This will create the user if it doesn't exist, so that it can be dropped safely, like so: GRANT USAGE ON *.* TO 'username'@'localhost'; DROP USER 'username'@'localhost'; FLUSH PRIVILEGES; USAGE actually means no privilege.
The EXISTS operator is used to test for the existence of any record in a subquery. The EXISTS operator returns TRUE if the subquery returns one or more records. EXISTS Syntax. SELECT column_name (s) FROM table_name. WHERE EXISTS. (SELECT column_name FROM table_name WHERE condition); Demo Database.
