modeling and designing relational databases
Modeling and designing control chart for monitoring time between events data
Ngày tải lên :
14/09/2015, 14:06
... Ye Zhisheng for their help and accompany Last, but not the least, my special thanks go to my parents, my sister and Mr Han Dongling Their love, support and understanding are the major motivation ... (Woodall and Montgomery, 1999) As an important branch of SQC, SPC has been adopted and widely used in many areas, such as manufacturing industry (Wu and Tian, 2005; Zantek, 2006; Wu and Wang, ... 2003; Woodall, 2006; Coory et al., 2008; Biswas and Kalbfleisch, 2008), service management (Herbert et al., 2003 and Pettersson, 2004) and finance (Shin and Sohn, 2007) It is a powerful collection...
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Practical mod_perl-CHAPTER 20:Relational Databases and mod_perl
Ngày tải lên :
24/10/2013, 08:15
... appropriate database handle, or if the ping( ) method fails, Apache::DBI establishes a new connection, stores the handle, and then returns the handle to the caller It is important to understand that the ... syntax Alternatively, you can switch databases with USE foo and USE bar, but this approach seems less convenient, and therefore error-prone Cannot find the DBI handler You must use DBI->connect( ... row on the client side This can tie up the server and prevent other threads from updating the tables 580 | Chapter 20: Relational Databases and mod_perl This is the Title of the Book, eMatter...
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UNIT 5. DATABASE MANAGEMENT SYSTEMS LESSON 5. RELATIONAL DATABASES AND SQL BASICSNOTE docx
Ngày tải lên :
31/03/2014, 20:20
... - Relational databases and SQL basics – page 14 Summary • SQL (Structured Query Language) is the language used to interact with a relational database • Relational databases, and the SQL standard, ... it is a database sub-language and is becoming the standard interface to relational and non -relational database management systems (DBMS) The DBMS stores the data and retrieves or updates it in ... can be created and manipulated using the Structured Query Language (SQL), which allows interaction with relational databases Database management systems - Relational databases and SQL basics...
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Chapter 10 Functional Dependencies and Normalization for Relational Databases
Ngày tải lên :
12/05/2014, 11:55
... Design Guidelines for Relational Databases (2) We first discuss informal guidelines for good relational design Then we discuss formal concepts of functional dependencies and normal forms - 1NF ... (For Multiple Keys) BCNF (Boyce-Codd Normal Form) Informal Design Guidelines for Relational Databases (1) What is relational database design? The grouping of attributes to form "good" relation ... Chapter Outline Informal Design Guidelines for Relational Databases 1.1Semantics of the Relation Attributes 1.2 Redundant Information in Tuples and Update Anomalies 1.3 Null Values in Tuples...
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Managing Time in Relational Databases: How to Design, Update and Query Temporal Data pptx
Ngày tải lên :
27/06/2014, 06:20
... 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 ... 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 ... www.elsevierdirect.com/companions/9780123750419 Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com MANAGING TIME IN RELATIONAL DATABASES How to Design, Update and Query Temporal Data TOM JOHNSTON RANDALL WEIS AMSTERDAM...
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Strength Modeling And Advanced Net Types Definitions
Ngày tải lên :
17/10/2013, 22:15
... Nets triand and trior have the same syntax and function as the nets wor and wand The example below explains the function wand out1; wor out2; buf (out1, 1'b0); buf (out1, 1'b1); //out1 is a wand ... Keywords wor, wand, trior, and triand are used to resolve such conflicts Net wand perform the and operation on multiple driver logic values If any value is 0, the value of the net wand is Net wor ... power supply supply0 gnd; //all nets connected to gnd are connected to ground A.3.5 wor, wand, trior, and triand When there is logic contention, if we simply use a tri net, we will get an x This...
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Modeling and Simulation of Microbial Depolymerization Processes of Xenobiotic Polymers
Ngày tải lên :
25/10/2013, 08:20
... distribution of PLA before and after enzymatic degradation Residual amounts of PLA after incubation for and 67 h were 40% and 27%, respectively [17, 18] 301 12 Modeling and Simulation of Microbial ... of the 7th Biennial Engineering Mathematics and Applications Conference, EMAC-2005, Melbourne Editors: Andrew Stacey and Bill Blyth and John Shepherd and A J Roberts, ANZIAM J., vol 47, pp C665–C681, ... ) = g (M ) (12.28) 297 298 12 Modeling and Simulation of Microbial Depolymerization Processes of Xenobiotic Polymers Equation (12.26) and the conditions (12.27) and (12.28) form an inverse problem...
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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 ... 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 ... refine the system Overview of Data Modeling and Database Design 8Ć7 8Ć8 Introduction to Oracle: SQL and PL/SQL Using Procedure Builder Database Design Designing a relational database system involves...
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Tài liệu overview of data modeling and database design pdf
Ngày tải lên :
21/12/2013, 06:17
... 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 ... relationships to 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 ... refine the system Overview of Data Modeling and Database Design 8Ć7 8Ć8 Introduction to Oracle: SQL and PL/SQL Using Procedure Builder Database Design Designing a relational database system involves...
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Tài liệu Managing time in relational databases- P1 ppt
Ngày tải lên :
24/12/2013, 02:16
... 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 ... 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 has run several ... co-author, Randy Weis Randy and I have often described our relationship as one in which we come up with an idea, and then I think through it in English while he thinks through it in code And this...
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Tài liệu Managing time in relational databases- P2 pptx
Ngày tải lên :
24/12/2013, 02:16
... the development and evolution of warehouses and marts, as it was happening over the last two decades Nor is it how they think of warehouses and marts Managing Time in Relational Databases Doi: ... records, fields and pointers; (ii) tables, rows, columns and foreign keys; and (iii) classes, objects, slots and links For the remainder of this book, we will use the table, row, column and foreign ... tables and their instances And at this level, temporal data is still a second-class citizen To manage it, developers have to build temporal structures and the code to manage them, by hand In...
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Tài liệu Managing time in relational databases- P3 doc
Ngày tải lên :
24/12/2013, 02:16
... part of IT personnel and end users to maintain and access the managed data And now we have the relational model, a model invented by Dr E F Codd An underlying assumption of the relational model is ... data can be managed with relational technology Dr Snodgrass’s book describes how current relational technology can be adapted to handle temporal data, and indeed to handle data along two orthogonal ... populated and in use, none of them are likely to be implemented The cost is just too high Queries and code, and the result sets and reports based on them, have already been written, and are already...
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Tài liệu Managing time in relational databases- P4 pptx
Ngày tải lên :
24/12/2013, 02:16
... ticks are used for effective time begin and end dates and for episode begin dates; and atomic clock ticks are used for assertion time begin and end dates, and for row create dates Clock ticks may ... bi-temporal data with the SQL and the DBMSs available at that time One of the greatest strengths of the standard model is that it discusses and illustrates both the maintenance and the querying of temporal ... uni- and bi-temporal data which, unlike the standard model of temporal data management, recognizes that rows in bi-temporal tables represent versions of things and that, Managing Time in Relational...
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Tài liệu Managing time in relational databases- P5 pptx
Ngày tải lên :
24/12/2013, 02:16
... WHERE oid ¼ 55 AND asr_beg_dt :my-cut rather than SELECT FROM WHERE oid ¼ 55 AND asr_beg_dt
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Tài liệu Managing time in relational databases- P6 pptx
Ngày tải lên :
24/12/2013, 02:16
... and other persistent objects, and also the creation and logical deletion of versions that were not done on time 91 92 Chapter THE ORIGINS OF ASSERTED VERSIONING: IT BEST PRACTICES The Scope and ... update and delete transactions are not basic, and are far more complex than this Chapter THE CORE CONCEPTS OF ASSERTED VERSIONING versioned only those handful of columns On the other hand, non-versionable ... report had contained no discrepancies, and if experience had shown us that our IT department could reliably rerun reports and queries and get them exactly right? And suppose the party requesting the...
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Tài liệu Managing time in relational databases- P7 pdf
Ngày tải lên :
24/12/2013, 02:16
... always [before] the other And it’s important to understand why there must be at least one clock tick between any pair of adjacent episodes It has to with understanding and enforcing the user’s ... written, and in which those queries are often run once or twice, and then discarded These “what-if” queries are usually written by business researchers and analysts, sometimes with and sometimes ... They are production queries, the ones which are run over and over again to produce standard reports and data extracts, usually on a standard schedule One reason that developers usually write...
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Tài liệu Managing time in relational databases- P8 pptx
Ngày tải lên :
24/12/2013, 02:16
... and assertion dates, in which a time period starts on its begin date, and ends one clock tick prior to its end date Effective begin and end dates, of course, indicate when the version began and ...
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Reliability modeling and evaluation of sulaimani erbil electrical power system
Ngày tải lên :
03/01/2014, 19:39
... order cuts and to eliminate any cuts containing first and second order cuts; and 6) Continue this procedure until maximum order of cut has been reached Only the first, the second and the third ... circuit and from 1999 to 2001 the line is operated with single circuit because one of the circuits is energized by 33 KV Reliability of Dokan and Derbandikhan H/P are considered to be 0.98 and 0.95 ... Sulaimani and Erbil governorate Case study 11 and 12 reliability of the regional power system evaluated by disjoint technique and compared with the previous case studies Case study 13 and 14 investigate...
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