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Fundamentals of Database Systems
... A path expression is used to specify a path to attributes and objects in an entry point A path expression starts at a persistent object name (or its iterator variable) The name will be followed by zero or more dot connected relationship or attribute names, e.g., d.chair (but not departments.chair ...
... A path expression is used to specify a path to attributes and objects in an entry point A path expression starts at a persistent object name (or its iterator variable) The name will be followed by zero or more dot connected relationship or attribute names, e.g., d.chair (but not departments.chair ...
Sem-III-IV-IT -Syllabus
... By E. Balagurasamy, Tata Mc-Graw Hill Publication. 3. Programming in Java2 By Dr. K. Somasundaram, Jaico Books ...
... By E. Balagurasamy, Tata Mc-Graw Hill Publication. 3. Programming in Java2 By Dr. K. Somasundaram, Jaico Books ...
still available here
... 3.2 Main-Memory Systems..................................................................................6 3.3 B-Tree Systems. .............................................................................................7 ...
... 3.2 Main-Memory Systems..................................................................................6 3.3 B-Tree Systems. .............................................................................................7 ...
Resolving the integrity/performance conflict
... of safe operations, users can define new operations at will. Essentially, applications are allowed to throw new code over the protection firewall and have the kernel execute this code on their behalf. Because the code is written in a safe programming language, the kernel can execute it without conce ...
... of safe operations, users can define new operations at will. Essentially, applications are allowed to throw new code over the protection firewall and have the kernel execute this code on their behalf. Because the code is written in a safe programming language, the kernel can execute it without conce ...
A Revolutionary Paradigm
... indeed, they were designed to address this very kind of problem. Despite the maturity of relational database products and the dramatic growth in computer power over the past decade, we still hear about projects that fail because the performance of the relational database used is just not good enough ...
... indeed, they were designed to address this very kind of problem. Despite the maturity of relational database products and the dramatic growth in computer power over the past decade, we still hear about projects that fail because the performance of the relational database used is just not good enough ...
A Concept for an Electronic Magazine
... formats suitable for the publication in the Web. The audio and video formats produced by the user are usually defined by the tools available on his local system and often differ from the standards used for publication. The format conversion is made by the management system of the EZine, without both ...
... formats suitable for the publication in the Web. The audio and video formats produced by the user are usually defined by the tools available on his local system and often differ from the standards used for publication. The format conversion is made by the management system of the EZine, without both ...
This document shows how to populate MS-SQL
... use “Query Builder” by clicking on the “Query Builder” button ( which is what we did and is as powerful and easy ). 2) If you choose Query Builder, choose the columns from the source database to be copied. Note :: Here , if you want a join of tables that can be done. Choose the fields that should be ...
... use “Query Builder” by clicking on the “Query Builder” button ( which is what we did and is as powerful and easy ). 2) If you choose Query Builder, choose the columns from the source database to be copied. Note :: Here , if you want a join of tables that can be done. Choose the fields that should be ...
View slideshow here - American Museum of Natural History
... Allows for centralized georeferencing ...
... Allows for centralized georeferencing ...
“User defined types and nested tables in object relational databases”
... performance problems compared with the existing navigational databases of the time and, over the last 25 years, has come to dominate the database market. With the rise in popularity of object oriented programming in the late 1980s developers began to propose alternatives and extensions to RDBMS in o ...
... performance problems compared with the existing navigational databases of the time and, over the last 25 years, has come to dominate the database market. With the rise in popularity of object oriented programming in the late 1980s developers began to propose alternatives and extensions to RDBMS in o ...
The Anatomy of a Data Modification
... Locks are necessary to give us a consistent point FOR ALL rows from which to start If any other transaction(s) have ANY of these rows locked we will wait until ALL locks have been acquired before we can proceed. In the case of this update (because it’s highly selective and because indexes exist to m ...
... Locks are necessary to give us a consistent point FOR ALL rows from which to start If any other transaction(s) have ANY of these rows locked we will wait until ALL locks have been acquired before we can proceed. In the case of this update (because it’s highly selective and because indexes exist to m ...
INTRODUCTION TO TRANSACTION PROCESSING
... should appear to be executed in isolation; that is, their final effect should be as if each transaction was executed alone from start to end. Durability: Once a transaction is committed, its changes (writes) applied to the database must never be lost due to of subsequent failure Enforcement of A ...
... should appear to be executed in isolation; that is, their final effect should be as if each transaction was executed alone from start to end. Durability: Once a transaction is committed, its changes (writes) applied to the database must never be lost due to of subsequent failure Enforcement of A ...
CT Insurance Dept. - University of Connecticut
... Where is Concurrency/Data Consistency Handled? Any Responsibility in Client? Is there Functional Server Between Client and Database? Will Database System be Sole Arbitrator? CTINS-1.21 ...
... Where is Concurrency/Data Consistency Handled? Any Responsibility in Client? Is there Functional Server Between Client and Database? Will Database System be Sole Arbitrator? CTINS-1.21 ...
29802 Produce and use a relational database to address an
... repository, commonly referred to as a database. The DBMS has many features including multi-user access/updates, control of data redundancy, maintenance of data security and integrity, audit trails, and transaction processing. Information Systems (IS) refers to the discipline which studies or informs ...
... repository, commonly referred to as a database. The DBMS has many features including multi-user access/updates, control of data redundancy, maintenance of data security and integrity, audit trails, and transaction processing. Information Systems (IS) refers to the discipline which studies or informs ...
JDBC
... ability to move a result set's cursor to a specific row. This feature is used by GUI tools and for programmatic updating. Updateable result set ability to use Java programming language commands rather than SQL. ...
... ability to move a result set's cursor to a specific row. This feature is used by GUI tools and for programmatic updating. Updateable result set ability to use Java programming language commands rather than SQL. ...
Chapter 19: Distributed Databases
... A record is split into component attributes that are stored separately. The key for an attribute value consists of (record-identifier, attribute- ...
... A record is split into component attributes that are stored separately. The key for an attribute value consists of (record-identifier, attribute- ...
Virtual Database Performance Tuning
... Agility and speed means not sweating the details. You might be able to get that ten-second query down to under one second. But if there isn't a big impact, then ignore it. Design for pushdown When designing mappings, you generally don't worry about memory usage or the difference of seconds in proces ...
... Agility and speed means not sweating the details. You might be able to get that ten-second query down to under one second. But if there isn't a big impact, then ignore it. Design for pushdown When designing mappings, you generally don't worry about memory usage or the difference of seconds in proces ...
Selecting a Database Management System (DBMS)
... Coincidentally, research of OODBMS also dates back to 1970’s (late 1970’s/early 1980’s) however the term ‘object-oriented’ wasn’t coined for databases of this type until the mid 1980’s. The first commercial product did not appear on the market until the late 1980’s. More recently, there has been a r ...
... Coincidentally, research of OODBMS also dates back to 1970’s (late 1970’s/early 1980’s) however the term ‘object-oriented’ wasn’t coined for databases of this type until the mid 1980’s. The first commercial product did not appear on the market until the late 1980’s. More recently, there has been a r ...
C# MySQL
... popular MySQL server, and Microsoft SQL databases. It enables you to browse and edit data, create and edit tables, views, procedures, triggers and scheduled events. Also, you can export structure and data either to SQL file, clipboard or to other servers. Main Features Connect to multiple servers ...
... popular MySQL server, and Microsoft SQL databases. It enables you to browse and edit data, create and edit tables, views, procedures, triggers and scheduled events. Also, you can export structure and data either to SQL file, clipboard or to other servers. Main Features Connect to multiple servers ...
Object - ShareStudies.com
... Overloading – ability to redefine standard function names and operators (i.e., +, –, the pointer deference operator –>) when applied to new types Template classes help to build a type-safe type system supporting collections and persistent types. ...
... Overloading – ability to redefine standard function names and operators (i.e., +, –, the pointer deference operator –>) when applied to new types Template classes help to build a type-safe type system supporting collections and persistent types. ...
Implementing a Categorical Information System
... of an EA sketch. Thus its powerful constraint definition facility is available to users via a simply understood graphical data model design tool. EASIK is the first system to do this. Furthermore EASIK will support the development of large systems using the SkDM approach. Such software support is vita ...
... of an EA sketch. Thus its powerful constraint definition facility is available to users via a simply understood graphical data model design tool. EASIK is the first system to do this. Furthermore EASIK will support the development of large systems using the SkDM approach. Such software support is vita ...
Year 9 Databases DATABASES WHAT IS A DATABASE? A
... (books, customers, products etc). Putting information into a computer database gives you far more flexibility in arranging, displaying and printing that information. A database is organised to make retrieving specific information easy. The parts of a database: Files: Think of a box of filing cards l ...
... (books, customers, products etc). Putting information into a computer database gives you far more flexibility in arranging, displaying and printing that information. A database is organised to make retrieving specific information easy. The parts of a database: Files: Think of a box of filing cards l ...
class Person (1) class Person (2)
... // This class is never used as a persistent hash key, so // include the following definition. If you do not, then // when you run the postprocessor it is unclear whether or // not you intend to use the class as a hash code. // Consequently, the postprocessor inserts a hashCode // function for you. T ...
... // This class is never used as a persistent hash key, so // include the following definition. If you do not, then // when you run the postprocessor it is unclear whether or // not you intend to use the class as a hash code. // Consequently, the postprocessor inserts a hashCode // function for you. T ...
Calvin: Fast Distributed Transactions for Partitioned Database Systems
... – Can be implemented by modifying the client transaction code – Execute “Reconnaissance query” that performs necessary reads to discover full read/write sets – Actual transaction added to global sequence with this info – Problem?? -Records read may have changed in between – Solution -The process is ...
... – Can be implemented by modifying the client transaction code – Execute “Reconnaissance query” that performs necessary reads to discover full read/write sets – Actual transaction added to global sequence with this info – Problem?? -Records read may have changed in between – Solution -The process is ...
Versant Object Database
![](https://commons.wikimedia.org/wiki/Special:FilePath/Versant_logo_2007.png?width=300)
Versant Object Database (VOD) is an object database software product developed by Versant Corporation.The Versant Object Database enables developers using object oriented languages to transactionally store their information by allowing the respective language to act as the Data Definition Language (DDL) for the database. In other words, the memory model is the database schema model.In general, persistence in VOD in implemented by declaring a list of classes, then providing a transaction demarcation application programming interface to use cases. Respective language integrations adhere to the constructs of that language, including syntactic and directive sugars.Additional APIs exist, beyond simple transaction demarcation, providing for the more advanced capabilities necessary to address practical issues found when dealing with performance optimization and scalability for systems with large amounts of data, many concurrent users, network latency, disk bottlenecks, etc.