design sample and collect data
Relational Database Design Algorithms and Further Dependecies
... of F, such that all their left- and right-hand-side attributes are in Ri 1 Informal Design Guidelines for Relational Databases (1) What is relational database design? The grouping of attributes ... Outline Designing a Set of Relations Properties of Relational Decompositions Algorithms for Relational Database Schema Multivalued Dependencies and Fourth Normal Form Join Dependencies and Fifth ... "goodness" of relational designs FDs and keys are used to define normal forms for relations FDs are constraints that are derived from the meaning and interrelationships of the data attributes ...
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Chapter Relational Database Design Algorithms and Further Dependecies
... Relational Database Schema Design (7) Discussion of Normalization Algorithms: Problems: The database designer must first specify all the relevant functional dependencies among the database ... for Relational Database Schema Design (5) Issues with null-value joins (a) Some EMPLOYEE tuples have null for the join attribute DNUM Algorithms for Relational Database Schema Design (5) Issues ... NATURAL JOIN to the EMPLOYEE and DEPARTMENT relations (c) Result of applying LEFT OUTER JOIN to EMPLOYEE and DEPARTMENT Algorithms for Relational Database Schema Design (6) The “dangling tuple”...
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database systems design, implementation, and management
... subtitle is Design, and our examination of database design is comprehensive For example, Chapters and examine the development and future of databases and data models and illustrate the need for design ... badly designed database Proper database design requires the designer to identify precisely the database’s expected use Designing a transactional database emphasizes accurate and consistent data and ... Structural and Data Dependence 1.6.2 Data Redundancy 1.6.3 Lack of Design and Data- Modeling Skills 1.7 Database Systems 1.7.1 The Database System Environment 1.7.2 DBMS Functions 1.7.3 Managing the Database...
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Managing Time in Relational Databases: How to Design, Update and Query Temporal Data pptx
... both uni-temporal and bi-temporal data Design encapsulation means that data modelers not have to design temporal data structures Instead, declarative specifications replace that design work These ... time and person Randall J Weis Randall J Weis, founder and CEO of InBase, Inc., has more than 24 years of experience in IT, specializing in enterprise data architecture, including the logical and ... colleges and corporate training programs Randy had been married to his wife Marina for over 30 years, and has children, Matt, Michelle and Nicolle He plays guitar and sings; he enjoys running, and...
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Creating your MySQL Database: Practical Design Tips and Techniques pdf
... Popularity and Impact The Need for MySQL Design "What I Next?" Data Design Steps Data as a Resource But this is my Data! Data Modeling Overview of the Relational Model Rule #1 Rule #2 Simplified Design ... isolated data islands created by users or departments so that the data can benefit the whole enterprise It may also happen that fewer islands exist and redundant data is eliminated Data Modeling Data ... But this is my Data! When building data designs, we have to meet users and understand the enterprise's data flow In an ideal world, every department, including the IT department, and every user...
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yii framework - design pattern and database and form (1)
... CDbCommand Để tạo CDbCommand ta sử dụng phương thức CDbConnection::createCommand() Xem ví dụ: $rowCount=$command->execute(); $dataReader=$command->query(); $rows=$command->queryAll(); $row=$command->queryRow(); ... $row=$command->queryRow(); $column=$command->queryColumn(); $value=$command->queryScalar(); row // // // // // // execute the non-query SQL execute a query SQL query and return all rows of result query and return the ... vấn) Để lấy kết truy vấn ta sử dụng CdbDataReader->read() $dataReader=$command->query(); // calling read() repeatedly until it returns false while(($row=$dataReader->read())!==false) { } JustLook...
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creating your mysql database practical design tips and techniques phần 1 pps
... Popularity and Impact The Need for MySQL Design "What I Next?" Data Design Steps Data as a Resource But this is my Data! Data Modeling Overview of the Relational Model Rule #1 Rule #2 Simplified Design ... Merge and Split Unregistered Version - http://www.simpopdf.com Creating your MySQL Database: Practical Design Tips and Techniques A short guide for everyone on how to structure their data and set ... Phase Preliminary List of Data Elements Tables and Sample Values Code Tables Themed Tables Composite-Key Tables Airline System Data Schema Sample Queries Inserting Sample Values Boarding Pass...
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creating your mysql database practical design tips and techniques phần 3 ppsx
... http://www.simpopdf.com Data Collecting In order to structure data, one must first gather data elements and establish the domain to which this data applies This chapter deals with raw data information ... or other sources, and the techniques that can help us to build a comprehensive data collection This collection will become our input for all further activities like data naming and grouping To ... visualize and less familiar with concepts However, there are distinctions between the user interface (UI) and the underlying data UI design considers ergonomic and aesthetic issues, whereas data structuring...
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creating your mysql database practical design tips and techniques phần 4 pdf
... the naming aspects of this data and will explain grouping techniques Summary Building a comprehensive collection of data elements is essential to the success of a data structuring activity However, ... change in the data structure • A change in the code (UI and reports) To stay flexible and avoid the wide-table syndrome, we need two tables: car_event and event [ 30 ] Simpo PDF Merge and Split Unregistered ... PDF Merge and Split Unregistered Version - http://www.simpopdf.com Data Naming Again, sample values are entered via phpMyAdmin: Data can also hide in a table name Let's consider the car and truck...
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creating your mysql database practical design tips and techniques phần 5 docx
... clear and understandable data structure, proper data elements naming is important We examined many techniques to apply in order to build consistent table and column names [ 37 ] Simpo PDF Merge and ... http://www.simpopdf.com Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com Data Grouping In the previous chapters, we built a data collection, and started to clean it by proper ... ���������������������������������������������������������������� Using sample data, and also our imagination to supplement incomplete sample data, can help to uncover problems in this area In our version...
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creating your mysql database practical design tips and techniques phần 6 ppt
... *internal_number 412 quantity_cleaning_product 12 Avoiding ENUM and SET MySQL and SQL in general offer what looks like convenient data types: ENUM and SET types Both types permit us to specify a list of ... ENUM or SET and we are using phpMyAdmin's insertion or data edit panels, a dropdown list of the values is displayed so it might be tempting to use those data types [ 46 ] Simpo PDF Merge and Split ... Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com Data Grouping table: sale sample value *internal_number 122 *date 2006-05-27 credit_rate_code F column name sample value...
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creating your mysql database practical design tips and techniques phần 9 pdf
... plane_brand_ model column name sample value *brand_id *id description APM-300 Here, the brand_id and a unique id form the primary keys for the plane model We want to know to which brand this ... phone, and website table: airline sample value *id description Air-Quebec column name sample value *id description table: plane_brand column name Fontax We avoid naming this table as brand because ... the keys involved Sample Queries As a complement to the list of tables and the database schema, let's see our tables in action! We will enter sample values into the tables, and then build some...
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creating your mysql database practical design tips and techniques phần 10 ppsx
... BLOB datatype 62 CHAR datatype 61 datatypes 61 datatypes and storage methods 61 InnoDB 55 query optimizer 60 storage engines 54 TEXT datatype 62 VARCHAR datatype 61 [ 92 ] Simpo PDF Merge and ... dealer 11 data elements 22 general manager, data elements 23 sales contract, data elements 23 salesperson, data elements 23 store assistant, data elements 24 data model, building 11 example of data ... 42 D data access policies 51 application level, security 53 as column name 30-32 as results 29, 30 as table name 30-32 data cleaning 27, 28 data design, with case study 11 data structure 10 data...
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Theoretical understanding and material design towards next generation data storage devices
... calculation, stands among the essential issues which provides guidance and insights into the device optimization in practice In addition, the computational screening and design of novel materials and heterostructures ... discuss the subject of magnetic data storage, to explore and unveil the physics dominating the device performance, and to find novel and practical methodologies of designing promising functional ... 4.3 64 Calculated complex band structures of (a) MgO and (b) Mg3 B2 O6 Both the real bands (red) and imaginary bands (black) are plotted 65 xvi 4.4 (a) Schematic...
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Design, modeling and fabrication of thermal actuated micromirror for fine tracking mechanism of high density optical data storage
... in ODS 20 Chapter Design and modeling 3.2 Design and numerical analysis 3.2.1 Actuation mechanism Driving force, speed and power consumption are key factors to be considered in designing a MEMS ... Design after testing 64 Fig 4-29: SEM pictures of Design 65 Fig 4-30: Prototype of Design 65 Fig 4-31: Prototype of Design 66 Fig 4-32: Prototype of Design ... Optical data storage (ODS) 15 2.4.1 The optical pick up head 16 2.4.2 Focus and tracking positioning 17 Design and modeling .18 3.1 Problem statement and MEMS...
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Sewing school book layout and design sample pages
... of two small children and lives in Tennessee Andria Lisle is a freelance journalist and public programs manager for the Memphis Brooks Museum of Art She is an avid sewer and cocreator of the Sewing ... photographer living and working in • Feature pitch to parenting and craft magazines • Mommy blogs and homeschooling blogs giveaways • Book trailer coming this summer • After school and summer camp ... Oftentimes when dolls and stuffed animals are made, the legs and arms end up too skinny to sew or stuff The proportions on this pattern work well Advise sewers to decorate the face and body before...
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Relational database design algorithms and further dependencies
... Relational Database Schema Design (7) Discussion of Normalization Algorithms: Problems: The database designer must first specify all the relevant functional dependencies among the database ... → B Break R22 into R221=AB and R222=AC both in 3NF SOLUTION: D = { DEG, BCD, AB, AC } Algorithms for Relational Database Schema Design (2) Example Let R= { ABCDE } and let F = { A →BC, BC →A, ... Relational Database Schema Design (3) Algorithm 11.4 Relational Synthesis into 3NF with Dependency Preservation and Lossless (Non-Additive) Join Property Input: A universal relation R and a set...
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Oracle Data Modeling and Relational Database Design Ed 1 (Activity Guide)
... from fees and time frames in individual cases Oracle Data Modeling Relational Design prohibited and is in Development Program (WDP) eKit materials are provided and for WDP in-class use Database ... upgrade to Oracle Database 11g on Linux Oracle Data Modeling Relational Design prohibited and is in Development Program (WDP) eKit materials are provided and for WDP in-class use Database only Copying ... Developer Data Modeler Oracle Modeling Relational Ais- strictly 14 prohibited and is in Development Program (WDP) eKit Data materials are providedand for WDP in-class useDatabase only CopyingDesign...
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Oracle Data Modeling and Relational Database Design Ed 1 (Student Guide - Volume 1)
... Database Design Information Requirements Relational Model Database Design Database Generation Database Copyright © 2010, Oracle and/ or its affiliates All rights reserved Database Design The database ... Analysis Logical Data Modeling Strategy and Analysis Cross-Checking Process Modeling Data Flow Diagram Design Database Design Relational and Physical Model: Table, View, etc Generation Database Generation ... multidimensional, data types, relational, and physical data models SQL Developer Data Modeler follows the Zachman Framework for defining data structures and is designed for data modelers, from...
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