TAILIEUCHUNG - OCA /OCP Oracle Database 11g A ll-in-One Exam Guide- P6

OCA /OCP Oracle Database 11g A ll-in-One Exam Guide- P6:There is an ever increasing demand for staff with IT industry certification. The benefits to employers are significant—they can be certain that staff have a certain level of competence—and the benefits to the individuals, in terms of demand for their services, are equally great. Many employers are now requiring technical staff to have certifications, and many IT purchasers will not buy from firms that do not have certified staff. | OCA OCP Oracle Database 11g All-in-One Exam Guide 6 The user process can be any client-side software that is capable of connecting to an Oracle server process. Throughout this book two user processes will be used extensively SQL Plus and SQL Developer. These are simple processes provided by Oracle for establishing sessions against an Oracle server and issuing ad hoc SQL. What the user process actually is does not matter to the Oracle server at all. When an end user fills in a form and clicks a submit button the user process will generate an INSERT statement detailed in Chapter 8 and send it to a server process for execution against the instance and the database. As far as the server is concerned the INSERT statement might just as well have been typed into SQL Plus as what is known as ad hoc SQL. Never forget that all communication with an Oracle server follows this client-server model. The separation of user code from server code dates back to the earliest releases of the database and is unavoidable. Even if the user process is running on the same machine as the server as is the case if for example one is running a database on one s own laptop PC for development or training purposes the client-server split is still enforced and network protocols are still used for the communications between the two processes. Applications running in an application server environment described in the next section also follow the client-server model for their database access. Application Server With the emergence of the Web as the de facto standard platform for delivering applications to end users has arisen the need for application servers. An application server allows client-side software traditionally installed on end-user computers to be replaced by applications hosted and executing from a centralized location. The application user interface is commonly exposed to users via their web browsers. These applications may make use of data stored in one or more database servers. Oracle

TỪ KHÓA LIÊN QUAN
TAILIEUCHUNG - Chia sẻ tài liệu không giới hạn
Địa chỉ : 444 Hoang Hoa Tham, Hanoi, Viet Nam
Website : tailieuchung.com
Email : tailieuchung20@gmail.com
Tailieuchung.com là thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi hàng triệu tài liệu như luận văn đồ án, sách, giáo trình, đề thi.
Chúng tôi không chịu trách nhiệm liên quan đến các vấn đề bản quyền nội dung tài liệu được thành viên tự nguyện đăng tải lên, nếu phát hiện thấy tài liệu xấu hoặc tài liệu có bản quyền xin hãy email cho chúng tôi.
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.