![]() IF EXISTS: DROP USER bob ERROR 1396 ( HY000 ): Operation DROP USER failed for 'bob' '%' DROP USER IF EXISTS bob Query OK, 0 rows affected, 1 warning ( 0. Examples DROP USER bob DROP USER foo2 localhost, foo2 '127.%' If the IF EXISTS clause is used, MariaDB will return a note instead of an error if the user does not exist. Only one error is produced for all users which have notīeen dropped: ERROR 1396 (HY000): Operation DROP USER failed for CREATE or DROP operations, for both users and roles, produce the If an error occurs, DROP USER will still drop the accounts that do If any of the specified user accounts do not exist, ERROR 1396 (HY000) Note that, if you specify an account that is currently connected, it will notīe deleted until the connection is closed. For additional information about specifying account names, see Only the user name part of the account name, a host name part of '%' is Or the DELETE privilege for the mysql database.Įach account is named using the same format as for the CREATE USER You must have the global CREATE USER privilege Privilege rows for the account from all grant tables. In this tutorial, you have learned how to use the MySQL DELETE statement to delete data from a table.The DROP USER statement removes one or more MariaDB accounts. LIMIT 5 Code language: SQL (Structured Query Language) ( sql ) WHERE country = 'France' ORDER BY creditLimit Similarly, the following DELETE statement selects customers in France, sorts them by credit limit in from low to high, and deletes the first 5 customers: DELETE FROM customers LIMIT 10 Code language: SQL (Structured Query Language) ( sql ) ![]() DELETE FROM table_nameĬonsider the following customers table in the sample database:įor example, the following statement sorts customers by customer names alphabetically and deletes the first 10 customers: DELETE FROM customers Note that the order of rows in a table is unspecified, therefore, when you use the LIMIT clause, you should always use the ORDER BY clause. LIMIT row_count Code language: SQL (Structured Query Language) ( sql ) If you want to limit the number of rows to delete, use the LIMIT clause as follows: DELETE FROM table_table To delete all rows from the employees table, you use the DELETE statement without the WHERE clause as follows: DELETE FROM employees Code language: SQL (Structured Query Language) ( sql )Īll rows in the employees table deleted. WHERE officeCode = 4 Code language: SQL (Structured Query Language) ( sql ) Suppose you want to delete employees whose the officeNumber is 4, you use the DELETE statement with the WHERE clause as shown in the following query: DELETE FROM employees Later, you will learn how to put the DELETE statement in a transaction so that you can roll it back. Note that once you delete data, it is gone. We will use the employees table in the sample database for the demonstration. To delete all rows in a table without the need of knowing how many rows deleted, you should use the TRUNCATE TABLE statement to get better performance.įor a table that has a foreign key constraint, when you delete rows from the parent table, the rows in the child table will be deleted automatically by using the ON DELETE CASCADE option. To delete data from multiple tables using a single DELETE statement, you use the DELETE JOIN statement which will be covered in the next tutorial. If you omit the WHERE clause, the DELETE statement will delete all rows in the table.īesides deleting data from a table, the DELETE statement returns the number of deleted rows. ![]() In this article, we have discussed how to drop a user in the Oracle database in two ways. You can also right-click on the shortcut menu. Notice that the WHERE clause is optional. Choose the corresponding connection from the list. The DELETE statement will delete rows that match the condition,
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