Deleting a Database¶
Function¶
This statement is used to delete a database.
Syntax¶
DROP [DATABASE | SCHEMA] [IF EXISTS] db_name [RESTRICT|CASCADE];
Keywords¶
IF EXISTS: Prevents system errors if the database to be deleted does not exist.
Precautions¶
DATABASE and SCHEMA can be used interchangeably. You are advised to use DATABASE.
RESTRICT: If the database is not empty (tables exist), an error is reported and the DROP operation fails. RESTRICT is the default logic.
CASCADE: Even if the database is not empty (tables exist), the DROP will delete all the tables in the database. Therefore, exercise caution when using this function.
Parameters¶
Parameter | Description |
|---|---|
db_name | Database name, which consists of letters, digits, and underscores (_). The value cannot contain only digits or start with a digit or underscore (_). |
Example¶
Create a database, for example, testdb, by referring to Example.
Run the following statement to delete database testdb if it exists:
DROP DATABASE IF EXISTS testdb;