Αποτελέσματα Αναζήτησης
26 Σεπ 2016 · USE foobar DROP USER 'foo'@'localhost'; DROP USER 'foo'@'%'; DROP DATABASE IF EXISTS foobar; They each selectively fail if one or the other has not run properly. How can I get them to run reliably (or fail gracefully, for example, to only drop a user if it exists)
DROP {DATABASE | SCHEMA} [IF EXISTS] db_name. DROP DATABASE drops all tables in the database and deletes the database. Be very careful with this statement! To use DROP DATABASE, you need the DROP privilege on the database. DROP SCHEMA is a synonym for DROP DATABASE.
The MySQL DROP DATABASE Statement. The DROP DATABASE statement is used to drop an existing SQL database. Syntax. DROP DATABASE databasename; Note: Be careful before dropping a database. Deleting a database will result in loss of complete information stored in the database! DROP DATABASE Example.
25 Ιαν 2024 · mysql> DROP DATABASE IF EXISTS databasename; mysql> SHOW DATABASES; Notes: Dropping a database with this command is irreversible and should only be done when you are certain of the decision. Use the IF EXISTS option to prevent errors in case the database does not exist.
The DROP DATABASE statement drops all tables in the database and deletes the database permanently. Therefore, you need to be very careful when using this statement. The following shows the syntax of the DROP DATABASE statement: DROP DATABASE [IF EXISTS] database_name; Code language: SQL (Structured Query Language) (sql)
26 Αυγ 2021 · mysqldump has a --add-drop-database exists as a mysqldump. If you use the --databases option and --add-drop-database the DROP DATABASE IF EXISTS SQL as become comes in the dump. --add-drop-database won't have an effect on a single database that is specified without the --databases option.
10 Ιουν 2024 · The implementation of the IF EXISTS clause in the DROP TABLE statement is as follows: DROP TABLE IF EXISTS table_name; With the IF EXISTS clause, MySQL will only attempt to drop the table if it exists in the database. If the table does not exist, the statement will execute successfully without generating an error. #Ad.
