DELETE FROM issue_customer_parameter WHERE CUSTOMER_ID = #{customerId} SELECT PARAMETER_KEY, PARAMETER_NAME, PARAMETER_VALUE FROM issue_customer_parameter WHERE CUSTOMER_ID = #{customerId} SELECT IFNULL( ( SELECT parameter_value FROM issue_customer_parameter WHERE del_flag = '0' AND parameter_key = 'audit_switch' AND customer_id = #{customerId} ), ( SELECT parameter_value FROM issue_customer_parameter WHERE del_flag = '0' AND parameter_key = 'audit_switch' AND customer_id = 'default' ) ) AS isOpen FROM DUAL