## Description

This command is used to delete the specified schema, and it will also delete all objects under the schema, including tables, views, indexes, etc.

## Syntax
```SQL
DROP SCHEMA [ IF EXISTS ] schema_name;
```
## Parameter Description

- **schema_name**: Specifies the name of the schema to be deleted.

## Usage Scenarios

1. When you need to delete a schema that is no longer in use, you can use this command.
2. If you want to avoid errors caused by the schema not existing during the deletion process, you can use the `IF EXISTS` option.

## Example

1. Delete the schema named `ods_schema`:
   ```SQL
   DROP SCHEMA ods_schema;
   ```
Here is the translated content:

2. When deleting a schema named `test_schema`, use the `IF EXISTS` option to avoid errors caused by the schema not existing:
   ```SQL
   DROP SCHEMA IF EXISTS test_schema;
   ```
```markdown
3. Delete the schema named `sales_schema` and all tables, views, and indexes under it:
```
   ```SQL
   DROP SCHEMA sales_schema;
   ```
## Precautions

- Before executing this command, please ensure that a backup of the schema to be deleted has been made to prevent data loss.
- The delete schema operation is irreversible. Once executed, all objects under the schema will be permanently deleted.
- When using this command in a production environment, please operate with caution to ensure that important data is not accidentally deleted.