Function
This statement is used to delete a database.
Syntax
| DROP [DATABASE | SCHEMA] [IF EXISTS] db_name [RESTRICT|CASCADE];
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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
Table 1 ParameterParameter
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Description
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db_name
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Database name, which consists of letters, digits, and underscores (_). The value cannot contain only digits or start with a digit or underscore (_).
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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;
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