Data manipulation

Phần 2 của bài giảng "Hệ quản trị cơ sở dữ liệu" tiếp tục cung cấp cho học viên những nội dung về: câu lệnh T-SQL; thao tác với dữ liệu (data manipulation language - DML); truy vấn dữ liệu; toán tử union; truy vấn tổng hợp; truy vấn lồng nhau;... Mời các bạn cùng tham khảo!

89p duonghanthienbang 05-10-2022 22 5   Download

Bài giảng Cơ sở dữ liệu (Database): Chương 4 - TS. Đặng Thị Thu Hiền cung cấp cho học viên các kiến thức về ngôn ngữ SQL - truy vấn, ràng buộc; câu lệnh mô tả dữ liệu DDL (Data Definition Language); câu lệnh thác tác dữ liệu DML (Data Manipulation Language); câu lệnh truy vấn dữ liệu SQL (Structured Query Language); câu lệnh quản lý dữ liệu DCL (Data Control Language);... Mời các bạn cùng tham khảo chi tiết nội dung bài giảng!

82p bachkhinhdaluu 10-12-2021 39 8   Download

Taking the developing Egyptian market as its focal point, the aim of this research is to contribute to the earnings management literature. Due to the limited data available for the Egyptian market, this research examines earnings management based on the entire operating performance of companies. In particular, the question of whether ineffectively performing Egyptian companies engage in upward earnings management by devising and applying income-increasing policies was investigated.

10p tozontozon 25-04-2020 11 1   Download

We extend the relational model of data to consider classes as attribute values, thereby to allow eary and convernient the representation of quantified queries. Facts regarding object classes can be stored and manipulated in the same way as facts regarding object instances. Our model is upwards compatible with the standard relational model

8p binhminhmuatrenngondoithonggio 09-06-2017 35 2   Download

Lecture Data Structures & Algorithms: Chapter 1 (C-Language) presented address, pointers, arrays, address of each element in an array, accessing & manipulating an array using pointers, another case of manipulating an array using pointers, two-dimensional array, pointer arrays, structures, structure pointers.

22p hoahue91 24-07-2014 44 3   Download

Bài giảng Hệ quản trị cơ sở dữ liệu: Chương 4 Ngôn ngữ vấn tin SQL trình bày về kiến thức ngôn ngữ thao tác dữ liệu (Data Manipulate Language - DML)ngôn ngữ thủ tục và ngôn ngữ phi thủ tục; ngôn ngữ định nghĩa dữ liệu (Data Definition Language - DDL).

62p thick_12 14-07-2014 109 10   Download

The unit in procedural programming is function, and unit in object-oriented programming is class Procedural programming concentrates on creating functions, while object-oriented programming starts from isolating the classes, and then look for the methods inside them. Procedural programming separates the data of the program from the operations that manipulate the data, while object-oriented programming focus on both of them

20p huanltgc00061 05-05-2013 41 2   Download

Manipulating URLs URL is an acronym for Uniform Resource Locator and is a reference (an address) to a resource on the Internet. Sample structure of a URL. The resource name part may contain: host name, file

15p huanltgc00061 05-05-2013 50 4   Download

Procedural vs. Object-Oriented Programming The unit in procedural programming is function, and unit in object-oriented programming is class Procedural programming concentrates on creating functions, while object-oriented programming starts from isolating the classes, and then look for the methods inside them. Procedural programming separates the data of the program from the operations that manipulate the data,

20p huanltgc00061 05-05-2013 48 4   Download

Developed by Sun Microsystems (James Gosling) A general-purpose object-oriented language Based on C/C++ Designed for easy Web/Internet applications Widespread acceptance Simple fixes some clumsy features of C++ no pointers automatic garbage collection rich pre-defined class library Object oriented focus on the data (objects) and methods manipulating the data all functions are associated with objects almost all data types are objects (files, strings, etc.) potentially better code organization and reuse...

14p huanltgc00061 05-05-2013 72 3   Download

Programming tools: Input/output (assign/graph-&-display) Repetition (for) Decision (if) Arrays List of numbers in brackets A comma or space separates numbers (columns) A semicolon separates row Zeros and ones Matrices: zeros() ones() Indexing (row,column) Colon Operator: Range of Data first:last or first:increment:last Manipulating Arrays & Matrices Transpose

17p doanhung_dtvtk10 19-03-2013 68 3   Download

Cài Oracle cần như sau: 1. Tạo 2 Groups: đặc tên là oinstall và dba 2. Tạo 1 User account tên là: oracle (note: Đúng ra đặt là Tí Tèo gì củng được, nhưng conventional, thấy thiên hạ cài Oracle hay đặt là vậy.) Login as root, run: � # groupadd oinstall # groupadd dba # useradd -m -g oinstall -G dba oracle Tạo password cho user: oracle # passwd oracle Changing password for user oracle. New UNIX password: Retype new UNIX password: passwd: all authentication tokens updated successfully.

7p gcsvpn 28-02-2013 62 7   Download

Là ngôn ngữ chuẩn để truy vấn và thao tác trên CSDL quan hệ Là ngôn ngữ phi thủ tục Khởi nguồn của SQL là SEQUEL - Structured English Query Language, năm 1974) Các chuẩn SQL SQL89 SQL92 (SQL2) SQL99 (SQL3) Ngôn ngữ định nghĩa dữ liệu (Data Definition Language - DDL): cho phép khai báo cấu trúc bảng, các mối quan hệ và các ràng buộc. Ngôn ngữ thao tác dữ liệu (Data Manipulation Language - DML): cho phép thêm, xóa, sửa dữ liệu. Ngôn ngữ truy vấn dữ liệu (Structured Query Language – SQL): cho phép truy vấn dữ liệu. Ngôn ngữ điều khiển...

41p tet0202 19-02-2013 146 20   Download

Perhaps the most difficult method of the four methods, memorizing is the technique many novice speakers start off with, because they are under the impression that this is how all speeches are prepared and delivered The most polished speakers forget their words halfway through

34p mientrung102 30-01-2013 83 21   Download

Gestures are reflections of every speaker's individual personality What's right for one speaker may not be right for another; however, the following six rules apply to anyone who seeks to become a dynamic effective speaker.

12p mientrung102 30-01-2013 63 12   Download

While the current trend in the training industry is heading toward the use of the LCD Projector technology, the overhead projector is still the most popular presentation device used today. Some presenters continue to misuse the overhead projector even though they have used them for years.

16p mientrung102 30-01-2013 83 16   Download

Researches on deductive database systems are not new ones, but propose of data model allowing manipulating data and knowledge on a particular framework is not easy but interesting goal. The paper aims at a model for knowledge in educational and training environment, beside of a presenting the achievement in the existing systems concerning knowledge. Certain data manipulation techniques for knowledge acquisition are proposed in the model, as knowledge discovering techniques in deductive database systems. ...

6p tuanlocmuido 19-12-2012 52 3   Download

The distinction between data administration and database administration. The purpose and tasks associated with data administration and database administration. The scope of database security. Why database security is a serious concern for an organization. The type of threats that can affect a database system. How to protect a computer system using computer-based controls

21p cuongbkav 02-12-2012 62 4   Download

Purpose and importance of SQL, the main language for querying relational databases. How to retrieve data using the SELECT statement. How to insert data using the INSERT statement. How to update data using the UPDATE statement. How to delete data using the DELETE statement. About an alternative language for querying relational databases called QBE.

78p cuongbkav 02-12-2012 60 4   Download

SQL commands can be classified in to three types: Data Definition Language commands (DDL) Data Manipulation Language commands (DML) Data Control Language commands (DCL) DDL commands are used to define a database, including creating, altering, and dropping tables and establishing constraints. DML commands are used to maintain and query a database, including updating, inserting, modifying, and querying data. DCL commands are used to control a database including administering privileges and saving of data....

50p thienthanoze 12-11-2012 67 9   Download