relational data model and language ppt

Ngày tải lên: 12/05/2014, 11:55

Ngày tải lên: 28/09/2015, 13:21

... 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 Relational ... 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 ... Relational and Relational and Non -relational Sources Non -relational Sources Relational and Relational and Non -relational Sources Non -relational Sources Data Retrieval Data Retrieval Fast Performance...

Ngày tải lên: 21/12/2013, 19:15

... CRITICAL SKILL 2.5: Relational and Logical Operators In the terms relational operator and logical operator, relational refers to the relationships that values can have with one another, and logical refers ... operations AND, OR, and NOT, according to the following truth table: Here is a program that demonstrates several of the relational and logical operators: // Demonstrate the relational and logical ... true into and false into 0, and vice versa as explained earlier The operands for a relational operator can be of nearly any type as long as they can be meaningfully compared The operands to the...

Ngày tải lên: 22/01/2014, 10:20

... the AND and OR operators Table 1-4 NOT Truth Table Operand NOT(Operand) TRUE UNKNOWN FALSE FALSE UNKNOWN TRUE Table 1-5 AND and OR Truth Table Operand1 Operand2 Operand1 AND Operand2 Operand1 ... relational database language, such as SQL, to manipulate data The language must be able to support all the central functions of a DBMS: creating a database, retrieving and entering data, implementing database ... introduction is modeling, specifically data modeling Modeling is the process of capturing the essence of a system in a known language that is common to the user A data model is a specific type of model that...

Ngày tải lên: 12/02/2014, 12:20

Ngày tải lên: 22/03/2014, 20:21

Ngày tải lên: 29/03/2014, 17:20

Ngày tải lên: 05/07/2014, 16:20

Ngày tải lên: 11/07/2014, 05:20

Ngày tải lên: 09/08/2014, 20:21

Ngày tải lên: 14/08/2014, 14:21

Ngày tải lên: 08/03/2014, 04:22

... proprietary access languages • Object relational database — A cross between an object database and a relational database Most often, object relational databases are relational databases that treat ... universal access language for relational databases The language enables you to build database structures, model business processes, and to add, delete, modify, and retrieve data The core SQL language ... Understanding relational database systems • Leveraging the features and benefits of relational databases • Understanding SQL concepts • Using DML and DDL SQL statements It is often said that data...

Ngày tải lên: 10/12/2013, 02:15

... Define a relational database and its components D Read an entity relationship model D Translate an entity relationship model into a relational database design Overview of Data Modeling and Database ... 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 ... of Data Modeling and Database Design 8Ć9 Server ÉÉ ÉÉ ÉÉ ÉÉ 8Ć10 Introduction to Oracle: SQL and PL/SQL Using Procedure Builder Data Model Models are a cornerstone of design Engineers build a model...

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...

Ngày tải lên: 10/12/2013, 17:15

... proprietary access languages • Object relational database — A cross between an object database and a relational database Most often, object relational databases are relational databases that treat ... universal access language for relational databases The language enables you to build database structures, model business processes, and to add, delete, modify, and retrieve data The core SQL language ... Understanding relational database systems • Leveraging the features and benefits of relational databases • Understanding SQL concepts • Using DML and DDL SQL statements It is often said that data...

Ngày tải lên: 15/12/2013, 20:15

... multiple linear regression model PRF consists of two components : a controlled part and a stochastic part (stochastic disturbance - random disturbance) εi is a random variable and follows normal a ... our regression model has more regressors However, with the help of Eviews and other data analysis software, we can find the estimators of the multiple regression model quickly and easily To explain ... the multiple regression model 2) Data requirement Some data is expressed in terms of a spreadsheet as above mentioned 3) Population Regression Function-PRF Study the model : Yi = β1 + β2 X 2i...

Ngày tải lên: 20/12/2013, 18:15

... entities, and label the line with the relationship verb This is the initial ER diagram for the logical data model Answer in v04_1609a_act42-1.bmp Activity 4.2: Creating a Logical Data Model Exercise ... 18 Activity 4.2: Creating a Logical Data Model Exercise 1: Identifying Relationships Between Entities In this exercise, you will identify ... Model Exercise 2: Determining Cardinality and Existence In this exercise, you will use the syntax discussed in the module to identify the cardinality and existence characteristics of each of the...

Ngày tải lên: 21/12/2013, 06:16

Ngày tải lên: 21/12/2013, 19:15

... 2 List the seven layers of the OSI model and the encapsulation unit used to describe the data grouping at each layer Also list the networking devices that operate...

Ngày tải lên: 21/12/2013, 19:15