relational database model in dbms
Inclusion of new types in relational database systems
Ngày tải lên :
22/10/2013, 10:15
... coordinates
(0, 1, 0, 1). The following is a compact representation of this request in QUEL:
2
installation wants at the time the DBMS is installed. In this case, all routines could be linked into ... described in
[ONG84].
Our initial experience with the system is that dynamic linking is not preferable to static linking. One
problem is that initial loading of routines is slow. Also, the ADT routines ... integer, floating point number, char-
acter string) and built -in operators (e.g. +, -, *, /) were motivated by the needs of business data processing
applications. However, in many engineering applications...
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Indexing XML Data Stored in a Relational Database pot
Ngày tải lên :
07/03/2014, 14:20
... for indexing XML data in the
upcoming version of Microsoftđ SQL Server,
and how it ties into the relational framework for
query processing.
1. Introduction
Introducing XML [3] support in relational ...
a JOIN in case of wildcard and //-axis queries.
6. Conclusions
This paper introduces techniques for indexing XML
instances stored in a relational database in an
undecomposed form. It introduces ... Typed XML
instances contain XSD type information in the internal,
binary representation. This enables efficient processing
for typed XML and allows building domain based value
indexes for...
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Apress - Pro SQL Server 2008 Relational Database Design and Implementation (2008)01
Ngày tải lên :
29/10/2013, 15:15
... 2008
Beginning SQL Server
2008 for Developers
Beginning
SQL Queries
Beginning
Database Design
Pro SQL Server 2008
Relational Database Design
and Implementation
www.apress.com
SOURCE CODE ONLINE
Companion ... working with
relational databases—including nearly every version of SQL Server.
My first goal in writing this book is to explain many of the important concepts
you need to learn from a database ...
Database Design and
Optimization
Pro SQL Server 2000
Database Design
US $59.99
Shelve in
Databases/SQL Server
User level:
Intermediate–Advanced
Davidson
Pro SQL Server 2008
Relational Database
...
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Apress - Pro SQL Server 2008 Relational Database Design and Implementation (2008)02
Ngày tải lên :
29/10/2013, 15:15
... Data Modeling: This chapter serves as the introduction to the main
tool of the data ar
chitect—the model. In this chapter, I introduce one modeling language
(IDEF1X) in detail, as it’s the modeling ... challenging things about doing database
design r
ight: it takes more time than not doing it (this is a battle that can occur frequently in project
planning meetings). Because there’s nothing visual ... code.
Chapter 12: Database Interoperability: Finally, in this chapter written by Kevin Kline, the chal-
lenges of building databases that have to run on not only SQL Server but also other database
server...
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Apress - Pro SQL Server 2008 Relational Database Design and Implementation (2008)03
Ngày tải lên :
08/11/2013, 21:15
... being used (in our
case, an RDBMS, namely, SQL Server). This involves choosing datatypes, building tables, applying
constr
aints
, writing triggers, and so on, to implement the logical model in ... on any RDBMS. Core
activities during this stage include the following:
ã Drilling down into the conceptual model to identify the full set of entities that define the system.
ã
D
efining the attr
ibute ... speaking, the logical model of any
relational database will be the same, be it for SQL Server, Oracle, Informix, DB2, MySQL, or any-
thing else based, in some measure, on the relational model.
■
Note
A...
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Apress - Pro SQL Server 2008 Relational Database Design and Implementation (2008)04
Ngày tải lên :
08/11/2013, 21:15
... Ideally, you are looking for something that is stable,
that you can control, and that is definitely going to allow you to uniquely identify every row in your
database.
One thing of interest here is ... happening soon!)
■
Tip
We tend to think of names in most systems as a kind of semiunique natural key. This isn’t good enough for
identifying a single row, but it’s great for a human to find a ... In Chapter 6, we’ll discuss implementing keys, and in Chapter 8, we’ll cover
implementing indexes for data access enhancement.
Having established what keys are, we’ll next discuss the two main...
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Tài liệu Pro SQL Sever 2012 Relational Database Design and Implementation ppt
Ngày tải lên :
12/02/2014, 12:20
... logic, including joins. is paper was pretty much the database declaration of
storage independence.
Moving six years in the future, after companies began to implement supposed relational database ... engine based database systems work the way they do.
Rule 1: The Information Principle
All information in the relational database is represented in exactly one and only one way—by
values in tables.
... fish in a barrel
unless you are planning on having fish for dinner—it is not a nice thing to do). Simply by writing a single
statement using a known table and its columns, you can put new data into...
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Tài liệu Báo cáo khoa học: Synchronization of Ca2+ oscillations: a capacitative (AC) electrical coupling model in neuroepithelium pptx
Ngày tải lên :
16/02/2014, 09:20
... significant change in
the homophilic binding of cadherins. The coactivation
of Pyk2 ⁄ Src kinase between the cells would result in
the dissociation of cadherins (Fig. 3A). However, if
intracellular ... rapidly dephosphorylated by a phospha-
tase in that cell without disrupting the homophilic
binding of cadherins (Fig. 3C).
If the synchronous increase in intracellular [Ca
2+
]
were responsible for ... increases in cell–cell adhesion. (A)
Simultaneous increases in intracellular
[Ca
2+
] in two adherent cells lead to disrup-
tion of cell–cell adhesion through disassem-
bly of cadherin–catenin...
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Tài liệu The Antelope Relational Database System Datascope: A tutorial ppt
Ngày tải lên :
20/02/2014, 05:21
... relational database? 6
dbe: a window on a database 6
Viewing a table 7
Viewing schema information 7
Performing a join 9
What about the join conditions? 10
Arranging fields in a window 11
Viewing ... following steps:
ã learning about relational databases in general
ã learning the tools and operations a particular DBMS provides
ã learning a particular database schema
ã learning a particular database
This ... 32
Grouping 32
Joining Tables 32
Inferring Join Keys 34
Inheritance of keys 34
Specifying Join Keys 35
Speed and efficiency 35
Summary 36
CHAPTER 5
Expression Calculator 37
Basic Operators and Database...
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Tài liệu Báo cáo khoa học: "Hidden Markov Tree Model in Dependency-based Machine Translation∗" pptx
Ngày tải lên :
20/02/2014, 09:20
... Multilinguality in ETAP-3: Reuse of Lexi-
cal Resources. In Proceedings of Workshop Multi-
lingual Linguistic Resources, COLING, pages 7–14.
Ond
ˇ
rej Bojar. 2008. Exploiting Linguistic Data in ... Tree Models (HMTM), which
are to our knowledge still unexploited in
the field of Computational Linguistics, in
spite of highly successful Hidden Markov
(Chain) Models. In dependency trees,
the independence ... baseline.
1 Introduction
Hidden Markov Tree Models (HMTM) were intro-
duced in (Crouse et al., 1998) and used in appli-
cations such as image segmentation, signal classi-
fication, denoising,...
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Skew-Aware Automatic Database Partitioning in Shared-Nothing, Parallel OLTP Systems ppt
Ngày tải lên :
07/03/2014, 14:20
... scheduling problems with earliness and tardiness
costs. In Principles and Practice of Constraint Programming, volume 2833,
pages 817–821, 2003.
[19] S. Duan, V. Thummala, and S. Babu. Tuning database ... administrator. Initially, this size is 25%
of the total number of tables in the database; as time elapses, the
limit increases up to 50%
1
. Increasing the number of tables relaxed
over time in ... Automating layout of
relational databases. In ICDE, pages 607–618, 2003.
[4] S. Agrawal, S. Chaudhuri, and V. R. Narasayya. Automated selection of
materialized views and indexes in SQL databases. In...
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Amazon Relational Database Service API Reference API Version 2011-04-01 pot
Ngày tải lên :
07/03/2014, 23:20
... Endpoint (p. 126)
Endpoint
Provides the name of the database engine to
be used for this DB Instance.
Type: String
Engine
Indicates the database engine version.
Type: String
EngineVersion
Provides ... Endpoint (p. 126)
Endpoint
Provides the name of the database engine to
be used for this DB Instance.
Type: String
Engine
Indicates the database engine version.
Type: String
EngineVersion
Provides ... 2011-04-01
37
Amazon Relational Database Service API Reference
Examples
DescriptionName
The meaning of this parameter differs according
to the database engine you use.
MySQL
Contains the name of the initial database...
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Amazon Relational Database Service API Reference API Version 2013-01-10 pdf
Ngày tải lên :
07/03/2014, 23:20
... the DB Snapshot.
Type: String
Engine
Specifies the name of the database engine.
Type: String
EngineVersion
Specifies the version of the database engine.
Type: String
InstanceCreateTime
Specifies ... of storage (in gigabytes) to be initially allocated for the database instance.
MySQL
Constraints: Must be an integer from 5 to 1024.
Type: Integer
Oracle
Constraints: Must be an integer from ... (input/output operations per second) to be initially allocated for the
DB Instance.
Constraints: Must be an integer greater than 1000.
Type: Integer
Required: No
LicenseModel
License model information...
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LogBase: A Scalable Log-structured Database System in the Cloud pot
Ngày tải lên :
16/03/2014, 16:20
... recovery starting point and updates the in- memory
indexes accordingly. If the LSN of the log entry is greater than the
corresponding index entry in the index, then the pointer in the index
entry ... in both systems. The performance of LogBase is su-
perior to HBase, because LogBase maintains a dense in- memory
index and each record has a corresponding index entry containing
its location in ... points to the location of that record
in the log. The index of each tablet can be maintained in memory
since the size of an index entry is much smaller than the record’s
size. The in- memory index...
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Virtualizing Performance-Critical Database Applications in VMware® vSphere™ pptx
Ngày tải lên :
16/03/2014, 16:20
... within which vCPUs of a virtual machine were to be scheduled. In ESX 4.0 this has been replaced with
finer-grained locking. It reduces scheduling overheads in cases where frequent scheduling ... VMM are posted in the shared completion rings and an interrupt is generated for the
guest operating system. By using this mechanism instead of requiring the guest to poll, these interrupts can ... Virtualization
Database applications and database management systems typically use large amounts of memory.
Maintaining application working sets in memory helps reduce storage I/O. In addition,...
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