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The SET_PARAMETER procedure sets a parameter used in administering a runtime environment.
Syntax
APEX_INSTANCE_ADMIN.SET_PARAMETER(
    p_parameter     IN VARCHAR2,
    p_value         IN VARCHAR2 DEFAULT 'N');
Parameters
Table: SET_PARAMETER Parameters describes the parameters available in the SET_PARAMETER procedure.
SET_PARAMETER Parameters
| Parameter | Description | 
|---|---|
| 
 | The instance parameter to be set. | 
| 
 | The value of the parameter. | 
Example
The following example demonstrates how to use the SET_PARAMETER procedure to set the SMTP_HOST_ADDRESS parameter for an Oracle Application Express instance.
BEGIN
    APEX_INSTANCE_ADMIN.SET_PARAMETER('SMTP_HOST_ADDRESS','mail.mycompany.com');
END;