administering data bases and datafiles
Tài liệu Báo cáo khoa học: "ENGLISH WORDS AND DATA BASES: HOW TO BRIDGE THE GAP" pdf
Ngày tải lên :
21/02/2014, 20:20
... expression A data base specifies an interpretation of a logical language, by specifying the extension of every constant A formalization of this view on data bases, an& its application to a CODASYL data ... applicable to relational data bases A relational data base specifies an interpretation of a logical language which contains for every relation R [K, At, An] a constant K denoting a set, and n functions ... meanings used in (i) and the primitive concepts at the data base level IV V THE RELATION BETWEEN EFL AND DBL THE PROBLEM OF COMPOUND ATTRIBUTES It is easy to imagine a different data base which would...
- 3
- 498
- 0
Data Integrity and Advanced Query Technique
Ngày tải lên :
25/08/2012, 09:00
... Constraint để kiểm soát data chứa table có Foreign key (tức table con) thực chất kiểm soát data table chứa Primary key (tức table cha) Ví dụ ta delete data table cha data table trở nên "mồ côi" ... Constraint trường hợp: Insert hay Update: Nếu data insert vào vi phạm ràng buộc có sẵn (violate constraint) hay constraint ta muốn áp dụng cho data thời mà data insert Tiến hành trình replicate Nếu ... CHECK (Col2 BETWEEN AND 1000) ) Tương tự Foreign Key Constraint ta cần disable Check Constraint trường hợp Insert hay Update mà việc kiểm soát tính hợp lệ data không áp dụng cho data Trường hợp thứ...
- 9
- 726
- 0
Data warehuose and data mining
Ngày tải lên :
18/01/2013, 16:15
... Environment • Subject = Customer • Data Warehouse Biến thời gian • Time • Data • 01/97 Data for January • • 02/97 Data for February • • 03/97 Data for March • • Data • Warehouse Ổn Định • Là lưu ... quan trong qui trình KDD Pattern Evaluation Data mining Task relevant data Data warehouse Data cleaning Knowledge Data integration selection Mục đích KTDL Data Mining Descriptive Predictive Classification ... Traditional Database • Data ware house • • • • • • • • Tích hợp Hiện hành – lịch sử Hướng chủ thể Bất biến Không chuẩn hóa Rõ ràng Tổng quát / chi tiết Người dùng : quản lý • Traditional Database...
- 36
- 480
- 0
DATA ANALYSIS AND DISCUSSION
Ngày tải lên :
12/04/2013, 16:19
... the study, the data collection method, instruments as well as process of data collection and data analysis IV Data analysis and discussion This focuses on presenting, analyzing and discussing ... to convey my deepest gratitude to my husband, my children, and my parents for their constant support and thorough understanding.Their great encouragement and love have helped me to overcome the ... only meets the demands of communication but also supports students’ needs as well 2.2 The role of attitudes in language learning Attitudes and learning go hand in hand Garder and Lamber (1972)...
- 75
- 463
- 1
Data mining and medical knowledge management cases and applications
Ngày tải lên :
16/08/2013, 16:24
... drive data gathering and experimental planning, and to structure the databases and data warehouses BK is used to properly select the data, choose the data mining strategies, improve the data mining ... their databases It results into numerous applications of various data mining tools and techniques The analyzed data are in different forms covering simple data matrices, complex relational databases, ... prohibited Data, Information and Knowledge and communication technologies These new technologies are speeding an exchange and use of data, information and knowledge and are eliminating geographical and...
- 465
- 631
- 2
Data Access and Networking
Ngày tải lên :
05/10/2013, 03:20
... hand and two text columns containing the nickname and notes about the hand 146 CHAPTER ■ DATA ACCESS AND NETWORKING ... /> < /data: DataGridTemplateColumn.CellTemplate> < /data: DataGridTemplateColumn>
- 16
- 381
- 0
Data Binding and Silverlight List Controls
Ngày tải lên :
05/10/2013, 03:20
... ObservableCollection GetHands() { 126 CHAPTER ■ DATA BINDING AND SILVERLIGHT LIST CONTROLS ObservableCollection hands = new ObservableCollection(); hands.Add( new StartingHands() ... DataGrid.Columns collection, as follows: < /data: DataGrid.Columns> < /data: DataGrid> Referring back to Figure ... the Card1 and Card2 properties from the data source Enter the following code:
- 32
- 347
- 1
Data Types and Values
Ngày tải lên :
05/10/2013, 12:20
... ECMAScript v3 standard, is not portable, and should be avoided When we discuss the object data type, you'll see that object properties and methods are used in the same way that string properties and methods ... this chapter 3.3 Boolean Values The number and string data types have a large or infinite number of possible values The boolean data type, on the other hand, has only two The two legal boolean values ... as true and false, it is sometimes convenient to think of them as on (true) and off (false) or yes (true) and no (false) Sometimes it is even useful to consider them equivalent to (true) and (false)...
- 19
- 549
- 0
Data Integrity and Advanced Query Technique
Ngày tải lên :
06/10/2013, 17:20
... Constraint để kiểm soát data chứa table có Foreign key (tức table con) thực chất kiểm soát data table chứa Primary key (tức table cha) Ví dụ ta delete data table cha data table trở nên "mồ côi" ... Constraint trường hợp: • Insert hay Update: Nếu data insert vào vi phạm ràng buộc có sẵn (violate constraint) hay constraint ta muốn áp dụng cho data thời mà data insert • Tiến hành trình replicate Nếu ... CHECK (Col2 BETWEEN AND 1000) ) Tương tự Foreign Key Constraint ta cần disable Check Constraint trường hợp Insert hay Update mà việc kiểm soát tính hợp lệ data không áp dụng cho data Trường hợp thứ...
- 8
- 379
- 0
Introducing Data Types and Operators
Ngày tải lên :
27/10/2013, 08:15
... stored C++ defines several types of data, and each type has unique characteristics Because data types differ, all variables must be declared prior to their use, and a variable declaration always ... stands for unsigned and the L for long (Both the U and the L must be used to specify an unsigned long.) Some examples are shown here: 12 C++ A Beginner’s Guide by Herbert Schildt Hexadecimal and ... its operand, C++ will perform the operation prior to obtaining the operand’s value for use by the rest of the expression If the operator follows its operand, then C++ will obtain the operand’s...
- 32
- 406
- 0
Tài liệu overview of data modeling and database design pptx
Ngày tải lên :
10/12/2013, 17:15
... Answer: 1:1 Husband and wife; taxi and driver; machine and operator; ship and dock M:1 Orders and items; auto and occupants; plane and passengers M:M Employees and skills; products and warehouses ... constraints For more information, see Develop Complex Data Models and Design Databases course description Overview of Data Modeling and Database Design 8Ć29 Map entities to tables Map attributes ... required for SQL command parsing D You should develop your own naming conventions and standards Overview of Data Modeling and Database Design 8Ć31 8Ć32 Introduction to Oracle: SQL and PL/SQL Using...
- 40
- 651
- 0
Tài liệu Data Management and Access Products ppt
Ngày tải lên :
10/12/2013, 17:15
... TD (pins and 14), TC (pins 24 and 23), RD (pins and 19), RC (pins 17 and 18), and XTC (pins 15 and 16) • Unbalanced indicators (referenced to pin 7) monitor RTS (pin 4), CTS (pin 5) and DCD (pin ... industry standard for many reasons Users and vendors of EIA-232, V.35, EIA-422 and EIA-449 data communications equipment are migrating to EIA-530 to take advantage of the higher data rate and the ... 16 EIA-232/V.24 has been a long standing electrical and mechanical data communication interface standard EIA-232/V.24 defines the narrowband, serial binary data communications channel used between...
- 68
- 600
- 0
Tài liệu Bài 6: Data Access and Viewingwith .NET docx
Ngày tải lên :
13/12/2013, 09:16
... System .Data – Để truy cập xử lý CSDL, sử dụng namespace System .Data, System .Data. Common, System .Data. OleDb, System .Data. SqlClient, System .Data. SqlTypes – Các lớp System .Data: DataSet, DataTable, DataRow, ... data adapter – Tạo data set – Sử dụng phương thức Fill() data adapter Xây dựng cách thêm data table – Tạo DataSet – Tạo DataTable Khởi tạo data table cách thêm DataColumn Thêm dòng liệu vào data ... Add data table vào data set cách thêm vào thuộc tính Tables data set Data Access and Viewing with NET Editor: Đoàn Quang Minh Đoà 10 Working with DataSet – Example DataSet ds = new DataSet(); DataTable...
- 20
- 424
- 0
Tài liệu Mapping Table and Column Names Between the Data Source and DataSet docx
Ngày tải lên :
14/12/2013, 18:16
... "colmapDescription"); // Create the DataSet and fill DataSet ds = new DataSet( ); da.Fill(ds); // Retrieve and display the mapped name of the table as grid caption dataGrid.CaptionText = "TableName: ... the grid dataGrid.DataSource = ds.Tables["tblmapCategories"].DefaultView; Discussion When the Fill( ) method of the DataAdapter is used to fill a DataSet, the column names used in the DataSet ... in the data source to a DataTable with different name in the DataSet When a batch query is used to fill multiple tables within a DataSet, the table names default to Table, Table1, Table2, and so...
- 3
- 445
- 0
Tài liệu Understanding Data Sources and Data Formats pdf
Ngày tải lên :
14/12/2013, 22:15
... dynamically generate and send to the user's browser an HTML-formatted page containing the latest news (probably extracted from a database) Server-side scripts can return data in both the XML and URL string ... Flash movie (as a projector or online), the data created while the movie was playing (user's name, last section visited, and so on) is saved This data can be retrieved the next time the user ... can store not only variables and their values, but any kind of data object, including arrays, XML objects—even custom objects You can make this process of saving data transparent to users, or...
- 4
- 441
- 0
Tài liệu overview of data modeling and database design pdf
Ngày tải lên :
21/12/2013, 06:17
... constraints For more information, see Develop Complex Data Models and Design Databases course description Overview of Data Modeling and Database Design 8Ć29 Map entities to tables Map attributes ... required for SQL command parsing D You should develop your own naming conventions and standards Overview of Data Modeling and Database Design 8Ć31 8Ć32 Introduction to Oracle: SQL and PL/SQL Using ... foreign keys, and business rules to constraints Build and Document D Build the prototype system Write and execute the commands to create the tables and supporting objects for the database D Develop...
- 40
- 799
- 2
Tài liệu Module 1: Introduction to Data Warehousing and OLAP pptx
Ngày tải lên :
21/12/2013, 19:15
... N-dimensional Data structure Data structure Data Content Data Content Detailed and Detailed and Summarized Data Summarized Data Summarized Data Summarized Data Data Sources Data Sources Relational and ... of OLAP databases Give examples of common OLAP applications Explain the differences between relational data marts and OLAP cubes in terms of data storage, data content, data sources, and data retrieval ... relationships between relational data marts and OLAP cubes Relational Relational Data Mart Data Mart OLAP Cube OLAP Cube Data Storage Data Storage Relational Relational Data Structure Data Structure N-dimensional...
- 48
- 582
- 0
Tài liệu DATA STRUCTURES AND ALGORITHMS USING C# pdf
Ngày tải lên :
22/12/2013, 10:16
... ArrayList, and Collection classes to the Stack and Queue classes and to the HashTable and the SortedList classes The data structures and algorithms student can now see how to use a data structure ... structured data type that stores data and provides operations for adding data to the collection, removing data from the collection, updating data in the collection, as well as operations for setting and ... programmers need to know and understand Given this, there is no formal analysis of the data structures and algorithms covered in the book Hence, there is not a single mathematical formula and not one mention...
- 366
- 686
- 4