cos346day5
... • They are used for querying, reporting and data mining applications • They are never updated (in the operational database sense – they may have new data imported form time-to-time) DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall ...
... • They are used for querying, reporting and data mining applications • They are never updated (in the operational database sense – they may have new data imported form time-to-time) DAVID M. KROENKE’S DATABASE PROCESSING, 10th Edition © 2006 Pearson Prentice Hall ...
Invisible Loading: Access-Driven Data Transfer
... Data preparation for database systems involves a non-trivial human cost (data modeling and schematizing) that is quite different from the tunable computational costs of copying, clustering and indexing[11]. If a user is not intimately familiar with the data and understands the meaning of only a few ...
... Data preparation for database systems involves a non-trivial human cost (data modeling and schematizing) that is quite different from the tunable computational costs of copying, clustering and indexing[11]. If a user is not intimately familiar with the data and understands the meaning of only a few ...
cayf12e_ppt_12
... Publishing as Prentice Hall Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall ...
... Publishing as Prentice Hall Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall ...
Module 4: Managing Security
... Were you able to process what the instructor said before moving on to next topic? Did you have ample time to reflect on what you learned? Did you have time to formulate and ask questions? ...
... Were you able to process what the instructor said before moving on to next topic? Did you have ample time to reflect on what you learned? Did you have time to formulate and ask questions? ...
Experiencing MIS 4e Chapter 5
... • Was it illegal, unethical, or okay for Chris to copy the database and take it home? • How could Chris have handled his discovery of the anomaly and protected himself? • Does Chris have any legal recourse over being fired? • How can a business protect its databases from unauthorized use or duplicat ...
... • Was it illegal, unethical, or okay for Chris to copy the database and take it home? • How could Chris have handled his discovery of the anomaly and protected himself? • Does Chris have any legal recourse over being fired? • How can a business protect its databases from unauthorized use or duplicat ...
CT Insurance Dept. - University of Connecticut
... Browser as Applet that Aren’t Available as Application (or Vice Versa)? Web Sites Can be Accessed by Applet or Application Application Can Load Browser Based on ...
... Browser as Applet that Aren’t Available as Application (or Vice Versa)? Web Sites Can be Accessed by Applet or Application Application Can Load Browser Based on ...
chapter14
... • Web development using ASP.NET is similar to developing GUI applications for Windows • ASP.NET separates procedural code from Web form (HTML) code Visual Basic .NET Programming: From Problem Analysis to Program Design ...
... • Web development using ASP.NET is similar to developing GUI applications for Windows • ASP.NET separates procedural code from Web form (HTML) code Visual Basic .NET Programming: From Problem Analysis to Program Design ...
Failure and Recovery, Logging
... then all the operations must be undone. Only need the before images (undo portion of the log). Once a transaction is committed, some of its actions ...
... then all the operations must be undone. Only need the before images (undo portion of the log). Once a transaction is committed, some of its actions ...
Chapter 14: Query Optimization
... when choosing evaluation plans: choosing the cheapest algorithm for each operation independently may not yield best overall algorithm. E.g. merge-join may be costlier than hash-join, but may provide a sorted output which reduces the cost for an ...
... when choosing evaluation plans: choosing the cheapest algorithm for each operation independently may not yield best overall algorithm. E.g. merge-join may be costlier than hash-join, but may provide a sorted output which reduces the cost for an ...
No Slide Title - American University
... • Atomicity requires that all parts of a transaction must be completed or the transaction is aborted. This property ensures that the database will remain in a consistent state. • Durability indicates that the database will be in a permanent consistent state after the execution of a transaction. In o ...
... • Atomicity requires that all parts of a transaction must be completed or the transaction is aborted. This property ensures that the database will remain in a consistent state. • Durability indicates that the database will be in a permanent consistent state after the execution of a transaction. In o ...
Turning Probabilistic Reasoning into Programming
... probabilistic model of the world Inference: conditioning the model on observations and computing probabilities of interest Learning: estimating the model from training data ...
... probabilistic model of the world Inference: conditioning the model on observations and computing probabilities of interest Learning: estimating the model from training data ...
Distributed and Parallel Database Systems
... In particular, shared-nothing parallel DBMS architectures, which we discuss below, are quite similar to the loosely interconnected distributed systems. Parallel DBMSs exploit recent multiprocessor computer architectures in order to build high-performance and high-availability database servers at a m ...
... In particular, shared-nothing parallel DBMS architectures, which we discuss below, are quite similar to the loosely interconnected distributed systems. Parallel DBMSs exploit recent multiprocessor computer architectures in order to build high-performance and high-availability database servers at a m ...
Inside “Big Data Management”: Ogres, Onions, or Parfaits?
... them, and generates appropriate query plans for execution by the dataflow runtime layer. Parallel database applications have exactly one way into the system’s architecture: SQL, which is available at the very top of the stack. Parallel database systems are actually like onions in several other ways ...
... them, and generates appropriate query plans for execution by the dataflow runtime layer. Parallel database applications have exactly one way into the system’s architecture: SQL, which is available at the very top of the stack. Parallel database systems are actually like onions in several other ways ...
Connecting to a Named Instance of Microsoft SQL Server from
... © 2014 Informatica Corporation. No part of this document may be reproduced or transmitted in any form, by any ...
... © 2014 Informatica Corporation. No part of this document may be reproduced or transmitted in any form, by any ...
Rational ClearQuest Performance Improvement Rational Software Whitepaper
... Regardless of the back-end database vendor selected for your Rational ClearQuest implementation, there are some general configuration tasks that will help ensure maximum performance. Periodic tuning and maintenance of an enterprise-level database requires the expertise of a DBA, and is vital to the ...
... Regardless of the back-end database vendor selected for your Rational ClearQuest implementation, there are some general configuration tasks that will help ensure maximum performance. Periodic tuning and maintenance of an enterprise-level database requires the expertise of a DBA, and is vital to the ...
PPT
... Action may be performed before or after event Can refer to old row and new row WHEN clauses tests whether to continue Action may be performed either ...
... Action may be performed before or after event Can refer to old row and new row WHEN clauses tests whether to continue Action may be performed either ...
NET Data Access
... DataSet ds = new DataSet(); // Create DataTable object: “Customers”. DataTable dt = new DataTable( “Customers” ); // Create and add columns to the table // 1. Explicitly create and Add a DataColumn DataColumn dc = new DataColumn( “CustID”, typeof(Int16) ); ...
... DataSet ds = new DataSet(); // Create DataTable object: “Customers”. DataTable dt = new DataTable( “Customers” ); // Create and add columns to the table // 1. Explicitly create and Add a DataColumn DataColumn dc = new DataColumn( “CustID”, typeof(Int16) ); ...
Corporate Data Bringing Together the Islands of Information with SAS/ACCESS Software
... descriptors for the casino's accounting data which are stored in an IMS database. The access descriptor definition process is more complicated than it is for DB2 because IMS does not store descriptive information about the contents of its databases. This information must be supplied at access descri ...
... descriptors for the casino's accounting data which are stored in an IMS database. The access descriptor definition process is more complicated than it is for DB2 because IMS does not store descriptive information about the contents of its databases. This information must be supplied at access descri ...
Query Processing in Main Memory Database Management Systems
... algonthms that am dnven by other cost factors such as the number of data compansons and the amount of data movement. We are studymg these issues, evaluatmg both old and new algonthms to determme which ones make the best use of both CPU cycles and memory (Note that whde memory can be expected to be l ...
... algonthms that am dnven by other cost factors such as the number of data compansons and the amount of data movement. We are studymg these issues, evaluatmg both old and new algonthms to determme which ones make the best use of both CPU cycles and memory (Note that whde memory can be expected to be l ...
Database theory: Query languages
... languages, schema design, query evaluation (clustering, indexing, optimization heuristics, etc.), storage and transaction management, and concurrency control to name just a few. In this chapter we only address the theory of query languages, which forms the core of database theory. For gaining an in- ...
... languages, schema design, query evaluation (clustering, indexing, optimization heuristics, etc.), storage and transaction management, and concurrency control to name just a few. In this chapter we only address the theory of query languages, which forms the core of database theory. For gaining an in- ...
Relational model
The relational model for database management is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in 1969 by Edgar F. Codd. In the relational model of a database, all data is represented in terms of tuples, grouped into relations. A database organized in terms of the relational model is a relational database.The purpose of the relational model is to provide a declarative method for specifying data and queries: users directly state what information the database contains and what information they want from it, and let the database management system software take care of describing data structures for storing the data and retrieval procedures for answering queries.Most relational databases use the SQL data definition and query language; these systems implement what can be regarded as an engineering approximation to the relational model. A table in an SQL database schema corresponds to a predicate variable; the contents of a table to a relation; key constraints, other constraints, and SQL queries correspond to predicates. However, SQL databases deviate from the relational model in many details, and Codd fiercely argued against deviations that compromise the original principles.