Best practices ® Query optimization in a data warehouse
... time. Updates to large volumes of data might have to be processed in parallel. Queries can be ad hoc, that is, the access pattern is not known in advance and might vary significantly from one query to the next. This paper examines some characteristics of data warehouse workloads in more detail and d ...
... time. Updates to large volumes of data might have to be processed in parallel. Queries can be ad hoc, that is, the access pattern is not known in advance and might vary significantly from one query to the next. This paper examines some characteristics of data warehouse workloads in more detail and d ...
Manual - Animated DataBase Courseware
... relationship because there are two entities involved. It is non-identifying because one does not identify the other one. There is not an identifying/weak entity such as the one described in Figure I.1.4. The numbers on each side of the relationship indicate the cardinality. Note that when there is o ...
... relationship because there are two entities involved. It is non-identifying because one does not identify the other one. There is not an identifying/weak entity such as the one described in Figure I.1.4. The numbers on each side of the relationship indicate the cardinality. Note that when there is o ...
Data-Protection Modes Data Guard provides three high
... • Archiver (ARCn) process: ARCn, or a SQL session performing an archival operation, creates a copy of the online redo logs locally for use in a primary database recovery. The ARCn process may also ship the redo stream to the RFS process while simultaneously archiving the online log. ARCn is also res ...
... • Archiver (ARCn) process: ARCn, or a SQL session performing an archival operation, creates a copy of the online redo logs locally for use in a primary database recovery. The ARCn process may also ship the redo stream to the RFS process while simultaneously archiving the online log. ARCn is also res ...
document
... (that is, i reaches some limit b) create an overflow bucket instead of splitting bucket entry table further. To delete a key value, locate it in its bucket and remove it. The ...
... (that is, i reaches some limit b) create an overflow bucket instead of splitting bucket entry table further. To delete a key value, locate it in its bucket and remove it. The ...
dsmDB: A Distributed Shared Memory Approach for Building
... Many current high-end database applications have stringent performance and availability requirements. Commercial solutions to these applications typically rely upon specialized hardware or proprietary software or both, often inheriting their design from early centralized databases [10]. Increasing d ...
... Many current high-end database applications have stringent performance and availability requirements. Commercial solutions to these applications typically rely upon specialized hardware or proprietary software or both, often inheriting their design from early centralized databases [10]. Increasing d ...
m-files backup policy - M
... M-Files Server locks the files of online vaults, and these files should not be accessed directly. These vaults can be backed up using Scheduled Jobs in the M-Files Server Administrator tool. This tool creates a single backup file of each document vault. Therefore, administrators do not need to backu ...
... M-Files Server locks the files of online vaults, and these files should not be accessed directly. These vaults can be backed up using Scheduled Jobs in the M-Files Server Administrator tool. This tool creates a single backup file of each document vault. Therefore, administrators do not need to backu ...
Database Tuning Principles, Experiments and Troubleshooting
... Troubleshooting Techniques http://www.mkp.com/dbtune Dennis Shasha ([email protected]) Philippe Bonnet ([email protected]) ...
... Troubleshooting Techniques http://www.mkp.com/dbtune Dennis Shasha ([email protected]) Philippe Bonnet ([email protected]) ...
VPARS DataBase - Virtual Software Systems, Inc.
... • VPARS provides only the multi-write capability; record locking is the responsibility of the application. ...
... • VPARS provides only the multi-write capability; record locking is the responsibility of the application. ...
Database Tuning Principles, Experiments and Troubleshooting
... (system) much better than a counter managed as an attribute value within a table (ad hoc). Counter is separate transaction. • The Oracle counter can become a bottleneck if every update is logged to disk, but caching many counter numbers is possible. • Counters may miss ids. ...
... (system) much better than a counter managed as an attribute value within a table (ad hoc). Counter is separate transaction. • The Oracle counter can become a bottleneck if every update is logged to disk, but caching many counter numbers is possible. • Counters may miss ids. ...
Resume of - Tropic Software East
... online, and give detailed information about their companies needs as it relates to Loyaltyworks offerings. Subsequent to successfully completing these initial products, I worked on a Python database engine, for internal use of other Python developers at Loyaltyworks, which would allow database tabl ...
... online, and give detailed information about their companies needs as it relates to Loyaltyworks offerings. Subsequent to successfully completing these initial products, I worked on a Python database engine, for internal use of other Python developers at Loyaltyworks, which would allow database tabl ...
Lecture #06 PDF document
... – Does not require transaction processing, recovery, and concurrency control mechanisms – Requires only two operations in data accessing: • initial loading of data and access of data. ...
... – Does not require transaction processing, recovery, and concurrency control mechanisms – Requires only two operations in data accessing: • initial loading of data and access of data. ...
Perturbation Analysis of Database Queries
... and incremental computation is through a global cache, which allows information from earlier units of computation to be passed to later ones (even if they run on different nodes). Memoization, as illustrated by Example 7, can be easily realized using any one of high-performance distributed key-value ...
... and incremental computation is through a global cache, which allows information from earlier units of computation to be passed to later ones (even if they run on different nodes). Memoization, as illustrated by Example 7, can be easily realized using any one of high-performance distributed key-value ...
Database Availability Benchmark
... – transactions » standard mechanism for reporting errors (txn abort) » encapsulate meaningful unit of work, providing consistent rollback upon failure compare RAID: blocks don’t let you do this ...
... – transactions » standard mechanism for reporting errors (txn abort) » encapsulate meaningful unit of work, providing consistent rollback upon failure compare RAID: blocks don’t let you do this ...
Operating System Security Fundamentals
... Authentication Methods (continued) • RADIUS: used by network devices to provide a centralized authentication mechanism • Secure Socket Layer (SSL): authentication information is transmitted over the network in an encrypted form • Secure Remote Password (SRP): – Password is not stored locally – Invu ...
... Authentication Methods (continued) • RADIUS: used by network devices to provide a centralized authentication mechanism • Secure Socket Layer (SSL): authentication information is transmitted over the network in an encrypted form • Secure Remote Password (SRP): – Password is not stored locally – Invu ...
Auditing Compliance with a Hippocratic Database
... Non-disruptive: The system should put minimal burden on normal query processing. Fast and precise: The system should be able to quickly and precisely identify all the queries that accessed the specified data. Fine-grained: It should be possible to audit even a single field of a specific record. Conv ...
... Non-disruptive: The system should put minimal burden on normal query processing. Fast and precise: The system should be able to quickly and precisely identify all the queries that accessed the specified data. Fine-grained: It should be possible to audit even a single field of a specific record. Conv ...
Document
... Upgrades from 10g to 11g • 10.2.0.4 patchkit actually has the Database Replay tools built in • DBMS_WORKLOAD_CAPTURE package available. • You can use this to capture workload from 10.2.0.4 and apply those to a 11.1 DB. ...
... Upgrades from 10g to 11g • 10.2.0.4 patchkit actually has the Database Replay tools built in • DBMS_WORKLOAD_CAPTURE package available. • You can use this to capture workload from 10.2.0.4 and apply those to a 11.1 DB. ...
On Improving User Response Times in Tableau
... In the past years, Tableau has become a leader in providing easyto-use data visualization tools. It currently connects to over 40 different data sources, from simple file-based sources, through SQL/MDX databases or web data sources, to Hadoop clusters. In a common intuitive interface, it allows for ...
... In the past years, Tableau has become a leader in providing easyto-use data visualization tools. It currently connects to over 40 different data sources, from simple file-based sources, through SQL/MDX databases or web data sources, to Hadoop clusters. In a common intuitive interface, it allows for ...
YANG-THESIS-2013 - The University of Texas at Austin
... redundancy of data. Technically, a database is an information base since it contains related facts. Semantically, however, people still call it a database. A relational database is a special type of database with relationships that link tables together. A relation is usually described as a table, wh ...
... redundancy of data. Technically, a database is an information base since it contains related facts. Semantically, however, people still call it a database. A relational database is a special type of database with relationships that link tables together. A relation is usually described as a table, wh ...
Downaload - atlanta academy
... Introduction to Database, Bound Control and UnBound Control, Recordset, Types of Connectivity (DAO, RDO, ADO), Introduction to Data Report, Design Data Report, Group Report. Unit IV - Graphical Application in VB – 15 Hrs (20 Marks) Draw (Line, Circle, Box, Ellipse), Animations, Graphical Command But ...
... Introduction to Database, Bound Control and UnBound Control, Recordset, Types of Connectivity (DAO, RDO, ADO), Introduction to Data Report, Design Data Report, Group Report. Unit IV - Graphical Application in VB – 15 Hrs (20 Marks) Draw (Line, Circle, Box, Ellipse), Animations, Graphical Command But ...
Query Optimization In Compressed Database Systems.
... but as pointed out by Witten et al. [30], compression is usually quite expensive and can wipe out achievable benefits. We assume in the remainder that compression never occurs during query execution and that an attribute once uncompressed will stay uncompressed in the remainder of a query. We contrib ...
... but as pointed out by Witten et al. [30], compression is usually quite expensive and can wipe out achievable benefits. We assume in the remainder that compression never occurs during query execution and that an attribute once uncompressed will stay uncompressed in the remainder of a query. We contrib ...
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.