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DBFarm: A Scalable Cluster for Multiple Databases
DBFarm: A Scalable Cluster for Multiple Databases

... These constraints point out to the need for some form of middleware based solution since database optimizations mostly apply to single instances and somebody has to coordinate the access to multiple, independent instances. The challenge in building such a middleware based solution is that it must be ...
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... As a basis for the assessment of the RID data, the RID database was designed and implemented by QuoData in 2008. The aim of the RID database is the structured storage of the annual RID data and the harmonization of the national RID data. An overview of the 2008 database is given in section 3. Howeve ...
Middleware-based Database Replication: The Gaps
Middleware-based Database Replication: The Gaps

... We make two contributions. First, we identify gaps between database research and practice on four different levels: RDBMS engine, SQL language, middleware, and system management. We show how overlooking seemingly small details can undermine replication systems. Second, we distill a few research topi ...
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1Z0-043

- Courses - University of California, Berkeley
- Courses - University of California, Berkeley

A Survey on Query Processing and Optimization
A Survey on Query Processing and Optimization

... A select-project-join query, an optimizer has to make many choices, the most important being: access methods, join order, join algorithms, and pipeling. [2] Access Method: The optimizer needs to pick an access method for each table in the query. Typically there are many choices, including a direct t ...
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... – Statement body can have arbitrarily many lines – As of February 2006, the current CTP does not support statement bodies in lambdas. You must use .NET 2.0 anonymous methods instead. ...
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... Use Parameterized Query must also be selected To define a parameter, add a row to the parameter table by clicking the + button The order in which the parameters are defined in the table is the order in which they appear in the statement ■ Index - An index that identifies the parameter ■ Type - The t ...
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... • Group related logical structures together • SYSTEM tablespace created automatically – Holds the data dictionary • Meta-data in machine-readable format • Includes security information, schema object information, space allocation, etc ...
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... About the Tutorial ..................................................................................................................................... i Audience ........................................................................................................................................ ...
CS-554-Part-6-DataLog
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... are (local) view definitions, that can only be used inside SQLStatement. • These local views are not stored in the database and are rather computed when executing SQLStatement. Although they are local, they must have different names from existing objects (tables or views). ...
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... An ensemble is characterized in the database by dceSetId and plScriptId Two or more ensembles can be associated together for processing a set of ensembles by creating a new ensemble with NULL dceSetId and two or more associations in the ensembleSets database table ...
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... scenarios where you previously could not use them effectively. Partitionaligned views improve query performance. In a typical scenario, a fact table is partitioned by date. Indexed views (or summary aggregates) can be defined on the fact table to help speed up queries. When you switch in a new table ...
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Data Mining - Lyle School of Engineering

... belong to at most one entity.  In E/R model, every E.S. must have a key. – It could have more than one key, but one set of attributes is the “designated” key. ...
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... you have the ability to install and configure SQL Server and copy and backup files and databases. Software Requirements: The vendor supported versions of SQL Server are: SQL Server 2005 or later SQL Server Express 2005 or later If you plan on using SQL Server Express, we recommend that you use 2008 ...
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...  Almost all SQL databases are based on the RDBM (Relational Database Model)  One important fact for SQL Injection  Amongst Codd's 12 rules for a Truly Relational Database System: 4. Metadata (data about the database) must be stored in the database just as regular data is ...
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Best Practices Guide: MDB Database Maintenance

... more of the following: o database files – tables, indexes and system catalogs o journal files – needed for recovery o checkpoint files – the database backup o work files – transient files o dump files – created as a result of an on-line checkpoint Refer to the “Ingres r3 Database Administrators Guid ...
On-line Analytical Processing with Oracle Database 12c
On-line Analytical Processing with Oracle Database 12c

... application by pre-calculating data that satisfies particular queries. If, for example, a BI dashboard contains twenty different queries it might be reasonable to create summary tables or table-based materialized views to support each of those queries and achieve excellent query performance. As quer ...
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complete_notes_salal..

...  The next higher level of abstraction describes what data are stored in the database, and what relationship exists among those data.  The entire database is described in terms of a small number of relatively simple structures. Database Administration (DBA), who must decide what information is to b ...
Why XML? - Tribury Media, LLC
Why XML? - Tribury Media, LLC

...  Creating a parser instance  Parsing the whole document  Processing the DOM tree  SAX  Creating a parser instance  Registrating event handlers with the parser  Parser calls the event handler during parsing ...
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Java Database Connectivity JDBC Architecture JDBC - CS

... while (e != null) { System.out.println(e.getSQLState()); System.out.println(e.getMessage()); System.out.println(e.getErrorCode()); e = e.getNextException(); ...
Partition Maintenance Effects
Partition Maintenance Effects

... The answer is maintenance. Partitions offer the ability to provide maintenance on excessively large tables in a timely manner. This is largely due to the fact that the table is split up into smaller, more manageable units. Each individual partition can have maintenance performed on it without affect ...
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Slide 1

... Discoverer Administrator to create, customize, and maintain this view for our users so they can easily access data in Discoverer. We must have access to at least one EUL in order to use Discoverer. Why End User Layer ? The EUL insulates Discoverer end users from the complexity usually associated wit ...
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Entity–attribute–value model

Entity–attribute–value model (EAV) is a data model to describe entities where the number of attributes (properties, parameters) that can be used to describe them is potentially vast, but the number that will actually apply to a given entity is relatively modest. In mathematics, this model is known as a sparse matrix. EAV is also known as object–attribute–value model, vertical database model and open schema.
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