PPT
... SI does not always give serializable executions Serializable: among two concurrent txs, one sees the effects of the other SI: neither sees the effects of the other Result: integrity constraints can be violated Variants implemented in many database systems ...
... SI does not always give serializable executions Serializable: among two concurrent txs, one sees the effects of the other SI: neither sees the effects of the other Result: integrity constraints can be violated Variants implemented in many database systems ...
kiferComp_348761_ppt14
... • Object-oriented languages are procedural – the advantages of a high-level query language, such s SQL, are lost • C++, Java, Smalltalk, etc., all have significantly different object modeling capabilities. Which ones should the database use? Can a Java application access data objects created by a C+ ...
... • Object-oriented languages are procedural – the advantages of a high-level query language, such s SQL, are lost • C++, Java, Smalltalk, etc., all have significantly different object modeling capabilities. Which ones should the database use? Can a Java application access data objects created by a C+ ...
Databases and Data Warehouses: Building Business Intelligence
... In the first two chapters, we briefly touched on a couple of important terms–business intelligence and analytics. We define them as follows: 1. Business intelligence (BI)–collective information–about customers, competitors, business partners–that gives you the ability to make effective, important, a ...
... In the first two chapters, we briefly touched on a couple of important terms–business intelligence and analytics. We define them as follows: 1. Business intelligence (BI)–collective information–about customers, competitors, business partners–that gives you the ability to make effective, important, a ...
Module #2 - Высшая школа экономики
... Impedance mismatch. Extending SQL with complex types: collections, structures, inheritance, references. Methods for complex types. Notion of persistence. Persistent programming languages. Persistent objects. Object identity. Query languages for object-oriented databases. Object-rel ...
... Impedance mismatch. Extending SQL with complex types: collections, structures, inheritance, references. Methods for complex types. Notion of persistence. Persistent programming languages. Persistent objects. Object identity. Query languages for object-oriented databases. Object-rel ...
Chapter 1: Introduction
... every disk block encrypted using key available in databasesystem software. Even if attacker gets access to database data, decryption cannot be done without access to the key. Entire relations, or specific attributes of relations non-sensitive relations, or non-sensitive attributes of relatio ...
... every disk block encrypted using key available in databasesystem software. Even if attacker gets access to database data, decryption cannot be done without access to the key. Entire relations, or specific attributes of relations non-sensitive relations, or non-sensitive attributes of relatio ...
Review of db4o from db4objects
... current version of the data and – if it matches with the earlier retrieved version – save the updated data with being sure that between the retrieval of the version in the store and the save, no other save takes place. The versioning can either be self-made or by using support features some DBMS sup ...
... current version of the data and – if it matches with the earlier retrieved version – save the updated data with being sure that between the retrieval of the version in the store and the save, no other save takes place. The versioning can either be self-made or by using support features some DBMS sup ...
Validator
... return the translated version. • Locale files can also specify default encodings and very basic date and time formats (this will be improved in next version) At the moment it is also possible to use right-toleft languages even though there is none available yet. • The Locales class is the preferred ...
... return the translated version. • Locale files can also specify default encodings and very basic date and time formats (this will be improved in next version) At the moment it is also possible to use right-toleft languages even though there is none available yet. • The Locales class is the preferred ...
Introduction to Decision Support, Data Warehousing, Business
... amount of resources underutilized. Consequently the most effective Decision Support Systems employ a feature called Parallel Query to break down such queries into multiple sub tasks to complete the query more quickly. Additional features such as compression and partitioning can also be used to impro ...
... amount of resources underutilized. Consequently the most effective Decision Support Systems employ a feature called Parallel Query to break down such queries into multiple sub tasks to complete the query more quickly. Additional features such as compression and partitioning can also be used to impro ...
Client/Server and Middleware
... wait for a response. If connection is lost, client must re-establish the connection and send request again. High scalability but low recovery, largely replaced by type 2 2. Synchronous RPC – distributed program using this may call services available on different computers – makes it possible to achi ...
... wait for a response. If connection is lost, client must re-establish the connection and send request again. High scalability but low recovery, largely replaced by type 2 2. Synchronous RPC – distributed program using this may call services available on different computers – makes it possible to achi ...
Client/Server and Middleware
... wait for a response. If connection is lost, client must re-establish the connection and send request again. High scalability but low recovery, largely replaced by type 2 2. Synchronous RPC – distributed program using this may call services available on different computers – makes it possible to achi ...
... wait for a response. If connection is lost, client must re-establish the connection and send request again. High scalability but low recovery, largely replaced by type 2 2. Synchronous RPC – distributed program using this may call services available on different computers – makes it possible to achi ...
Probabilistic Databases - Home | Georgia State University
... • Is the probability that a person of type X will purchase product Y greater if that person has also purchased product Z ? • If X is known how much additional information about Y is provided by knowledge of Z ? ...
... • Is the probability that a person of type X will purchase product Y greater if that person has also purchased product Z ? • If X is known how much additional information about Y is provided by knowledge of Z ? ...
ODBC : JDBC
... Java Support for ODBC : JDBC When applications written in Java want to access data sources, they use classes and associated methods provided by Java DBC (JDBC) API. JDBC is specified an an “interface”. An interface in Java can have many “implementations”. So it provides a convenient way to realize ...
... Java Support for ODBC : JDBC When applications written in Java want to access data sources, they use classes and associated methods provided by Java DBC (JDBC) API. JDBC is specified an an “interface”. An interface in Java can have many “implementations”. So it provides a convenient way to realize ...
Libname: Start Your Engines
... Another important benefit is the ability to define the data being read in once. When using PROC ACCESS or the SQL pass-through, the connection to the database must be defined each time the DBMS tables are referenced. With the LIBNAME engine, the data definition happens just once. ...
... Another important benefit is the ability to define the data being read in once. When using PROC ACCESS or the SQL pass-through, the connection to the database must be defined each time the DBMS tables are referenced. With the LIBNAME engine, the data definition happens just once. ...
Welcome to: CMPS 277 – Principles of Database Systems Instructor
... and the conceptual level of databases. II. The language should have high enough expressive power to be able to pose useful and interesting queries against the database. III. The language should be efficiently implementable to allow for the fast retrieval of information from the database. ...
... and the conceptual level of databases. II. The language should have high enough expressive power to be able to pose useful and interesting queries against the database. III. The language should be efficiently implementable to allow for the fast retrieval of information from the database. ...
Online Analytical Processing Systems
... Two reasons why traditional OLTP is not suitable for data warehousing are presented: (a) Given that operational databases are finely tuned to support known OLTP workloads, trying to execute complex OLAP queries against the operational databases would result in unacceptable performance. Furthermore, ...
... Two reasons why traditional OLTP is not suitable for data warehousing are presented: (a) Given that operational databases are finely tuned to support known OLTP workloads, trying to execute complex OLAP queries against the operational databases would result in unacceptable performance. Furthermore, ...
Abstract
... limited ranking capabilities. For instance, PubMed allows users to submit highly expressive Boolean keyword queries, but ranks the query results by date only. However, a user would typically prefer a ranking by relevance, measured by an information retrieval (IR) ranking function. A naive approach w ...
... limited ranking capabilities. For instance, PubMed allows users to submit highly expressive Boolean keyword queries, but ranks the query results by date only. However, a user would typically prefer a ranking by relevance, measured by an information retrieval (IR) ranking function. A naive approach w ...
Transactions
... Transaction Processing Most of the information systems in businesses are transaction based (databases or TP-Monitors). The market for transaction processing is many tens of billions of dollars per year Past: transaction processing was used mostly in large companies Now: WWW, small TP-Monitors ...
... Transaction Processing Most of the information systems in businesses are transaction based (databases or TP-Monitors). The market for transaction processing is many tens of billions of dollars per year Past: transaction processing was used mostly in large companies Now: WWW, small TP-Monitors ...
Document
... – A series of related UPDATE statements to change the values of attributes in various tables – A series of INSERT statements to add rows to one or more tables – A combination of SELECT, UPDATE, and INSERT statements ...
... – A series of related UPDATE statements to change the values of attributes in various tables – A series of INSERT statements to add rows to one or more tables – A combination of SELECT, UPDATE, and INSERT statements ...
Business Computing
... system for storing and delivering massive quantities of data. It is a centralized data repository that stores and provides already transformed and summarized dat, therefore, making it an appropriate environment for more efficient DSS and EIS applications. • Metadata : Metadata is data about data. Th ...
... system for storing and delivering massive quantities of data. It is a centralized data repository that stores and provides already transformed and summarized dat, therefore, making it an appropriate environment for more efficient DSS and EIS applications. • Metadata : Metadata is data about data. Th ...
Data connection and manipulation of archaeological database
... schema; one may need to split tables into different partitions to take advantage of concurrent operations, or merge tables in cases where different tables are frequently joined, so that performance improves if one merged table represents the stored join. Decisions can also be made on the tuning of t ...
... schema; one may need to split tables into different partitions to take advantage of concurrent operations, or merge tables in cases where different tables are frequently joined, so that performance improves if one merged table represents the stored join. Decisions can also be made on the tuning of t ...
Chapter 6
... Database Management Systems • A database management systems (DBMS) is a set of separate computer programs that enable users to create, modify, and utilize database information more efficiently. • The data definition language (DDL) of a DBMS enables users to define the record structure of any partic ...
... Database Management Systems • A database management systems (DBMS) is a set of separate computer programs that enable users to create, modify, and utilize database information more efficiently. • The data definition language (DDL) of a DBMS enables users to define the record structure of any partic ...
Java DataBase Connectivity (JDBC)
... JDBC is an interface which allows Java code to execute SQL statements inside relational databases ...
... JDBC is an interface which allows Java code to execute SQL statements inside relational databases ...
Versant Object Database
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.