Αποτελέσματα Αναζήτησης
9 Ιουν 2011 · delete from YourTable where YourTable.columnA in (select columnA from YourTable group by column A having count(*) > 1)
The GROUP BY statement groups rows that have the same values into summary rows, like "find the number of customers in each country". The GROUP BY statement is often used with aggregate functions (COUNT(), MAX(), MIN(), SUM(), AVG()) to group the result-set by one or more columns.
4 Απρ 2021 · DELETE t1 FROM data t1 JOIN data t2 USING (channel_id,timestamp) WHERE t1.id > t2.id
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.
To remove a user account from the MySQL Server, you use the DROP USER statement as follows: DROP USER account_name; Code language: SQL (Structured Query Language) (sql) In this syntax, you specify the name of the user account that you want to remove after the DROP USER keywords.
6 Φεβ 2022 · To remove a single MySQL user account, you can use the DROP USER statement as below- DROP USER userName; Code language: SQL (Structured Query Language) (sql) You might want to remove multiple user accounts as well in one go. For that, you can use the following syntax- DROP USER user1 [, userNames]......;
You must have the global CREATE USER privilege or the DELETE privilege for the mysql system database to use the DROP USER statement. The DROP USER statement also removes the user's privileges and deletes the account's rows from the user table in the mysql system database.
