ora12c_verify_function函数验证密码必须满足以下要求： The password contains no fewer than 8 characters and includes at least one numeric and one alphabetic character. The password is not the same as the user name or the user name reversed. The password is not the same as the database name. The password does not contain the word oracle (such as oracle123). The password differs from the previous password by at least 8 characters. The password contains at least 1 special character. The following internal checks are also applied: The password does not exceed 30 characters. The password does not contain the double-quotation character ("). However, it can be surrounded by double-quotation marks.