3 A Practitioner`s G uide to Data Management and Data Integration
... perform constraint checking such as verifying that data values have been taken from an approved list of values or controlled vocabulary, that numeric data fall in the correct range, or that a specific cell has not been left blank; but in practice this is not often done. Furthermore, while advanced f ...
... perform constraint checking such as verifying that data values have been taken from an approved list of values or controlled vocabulary, that numeric data fall in the correct range, or that a specific cell has not been left blank; but in practice this is not often done. Furthermore, while advanced f ...
Lecture Notes (6up)
... The Data Mapper converts a n-to-1 association to a foreign key relation (persist) or foreign key to object (retrieve). ...
... The Data Mapper converts a n-to-1 association to a foreign key relation (persist) or foreign key to object (retrieve). ...
Secondary Index
... The data file is ordered on a non-key field unlike primary index, which requires that the ordering field of the data file have a distinct value for each record. Includes one index entry for each distinct value of the field; the index entry points to the first data block that contains records with th ...
... The data file is ordered on a non-key field unlike primary index, which requires that the ordering field of the data file have a distinct value for each record. Includes one index entry for each distinct value of the field; the index entry points to the first data block that contains records with th ...
Optimization of Cloud Database Route Scheduling
... Cloud database system is composed of several sites, which are also called notes. Notes are linked in the communication network, and each one has its own database, central processing unit (CPU), terminal and local database management system (LDMS). There for, cloud database system can be regarded as ...
... Cloud database system is composed of several sites, which are also called notes. Notes are linked in the communication network, and each one has its own database, central processing unit (CPU), terminal and local database management system (LDMS). There for, cloud database system can be regarded as ...
What Is a View?
... Remove a view without losing data because a view is based on underlying tables in the database. SQL> DROP VIEW empvu10; View dropped. ...
... Remove a view without losing data because a view is based on underlying tables in the database. SQL> DROP VIEW empvu10; View dropped. ...
A Self-managing Data Cache for Edge-Of
... automatically populate client caches without the need for an administrator. The contents of the client cache are described logically by a set of “semantic regions”, expressed as query predicates over base tables as opposed to a list of the physical pages [8]. The semantic cache proposal, however, is ...
... automatically populate client caches without the need for an administrator. The contents of the client cache are described logically by a set of “semantic regions”, expressed as query predicates over base tables as opposed to a list of the physical pages [8]. The semantic cache proposal, however, is ...
COMPASS Cave Database Help
... CaveBase is program that allows you to create, query and use database data with your cave survey data. CaveBase can access any standard Windows database data including DBase, Paradox, FoxPro, InterBase, MS Access, ODBC and many others. It can also create new databases without any other data software ...
... CaveBase is program that allows you to create, query and use database data with your cave survey data. CaveBase can access any standard Windows database data including DBase, Paradox, FoxPro, InterBase, MS Access, ODBC and many others. It can also create new databases without any other data software ...
Natix
... easily be determined whether one or more transactions have updates on a dirty page. The information is included in the dirty page checkpoint log records, and as a result is available after restart analysis ...
... easily be determined whether one or more transactions have updates on a dirty page. The information is included in the dirty page checkpoint log records, and as a result is available after restart analysis ...
Chapter 13 – Data Warehousing
... about the facts through their attributed Must define common business attributes that will be used to narrow a search, group information, or describe dimensions. (ex.: Time / Location / Product) No mathematical limit to the number of dimensions (3-D makes it easy to model) ...
... about the facts through their attributed Must define common business attributes that will be used to narrow a search, group information, or describe dimensions. (ex.: Time / Location / Product) No mathematical limit to the number of dimensions (3-D makes it easy to model) ...
A Review on Partitioning Techniques in Database
... scheme ensures an even distribution of tuples across disks; that is, each disk has approximately the same number of tuples as do the others. Hash Partitioning: In this one or more attributes from the given relation‟s schema are designated as the partitioning attributes. A hash function is chosen who ...
... scheme ensures an even distribution of tuples across disks; that is, each disk has approximately the same number of tuples as do the others. Hash Partitioning: In this one or more attributes from the given relation‟s schema are designated as the partitioning attributes. A hash function is chosen who ...
Data Warehouse Technologies
... For example; in a time dimension, Days come together to make months, months to make quarters, and quarters to make years. ...
... For example; in a time dimension, Days come together to make months, months to make quarters, and quarters to make years. ...
Proceedings of the FREENIX Track: 2004 USENIX Annual Technical Conference USENIX Association
... A checkpoint of a virtual database can be performed at any point in time. Checkpointing can be manually triggered by the administrator or automated based on temporal rules. Taking a snapshot of a backend while the system is online requires disabling this backend so that no updates occur on it during ...
... A checkpoint of a virtual database can be performed at any point in time. Checkpointing can be manually triggered by the administrator or automated based on temporal rules. Taking a snapshot of a backend while the system is online requires disabling this backend so that no updates occur on it during ...
The European System for Monitoring Drug Safety, EudraVigilance
... drug presented to the regulators for approval, the potential benefits for public health need to be balanced against known safety risks. Information on safety risks at the moment of approval comes from pre-clinical and more importantly, clinical data originating from clinical trials. As the time inte ...
... drug presented to the regulators for approval, the potential benefits for public health need to be balanced against known safety risks. Information on safety risks at the moment of approval comes from pre-clinical and more importantly, clinical data originating from clinical trials. As the time inte ...
HP PolyServe Software for Microsoft SQL Server
... storage area network (connected via fibre channel or iSCSI), one or more HP storage arrays attached to the SAN, and one or more standard Ethernet networks linking the servers. Matrix Server itself includes these capabilities: A cluster file system that allows multiple servers to access the same stor ...
... storage area network (connected via fibre channel or iSCSI), one or more HP storage arrays attached to the SAN, and one or more standard Ethernet networks linking the servers. Matrix Server itself includes these capabilities: A cluster file system that allows multiple servers to access the same stor ...
Computing Pareto Frontiers and Database
... the preference operators. The operator PLUS denotes the Pareto composition. This means that {p1} PLUS {p2} induces an order, where a tuple is better if and only if, it is better or equal w.r.t. both {p1} and {p2} and strictly better w.r.t. one of them. The PRIOR TO keyword combines the two given ord ...
... the preference operators. The operator PLUS denotes the Pareto composition. This means that {p1} PLUS {p2} induces an order, where a tuple is better if and only if, it is better or equal w.r.t. both {p1} and {p2} and strictly better w.r.t. one of them. The PRIOR TO keyword combines the two given ord ...
application oriented search
... A lot of scientific data • Complex structure • Stored in files distributed in Grid Scientific analyses can be represented as declarative queries • Complex queries with numerical computations • Long running or batch queries Utilization of computational resources of Grid January 20, 2006 ...
... A lot of scientific data • Complex structure • Stored in files distributed in Grid Scientific analyses can be represented as declarative queries • Complex queries with numerical computations • Long running or batch queries Utilization of computational resources of Grid January 20, 2006 ...
flt-schedul
... There are 6 hubs each of which is completely connected to the others with 1 flight per hour 18 hours per day. Each of the 6 hubs is connected to about 6 non-hub cities with 1 flight every 2 hours 18 hours per day. About 30% of all reservations are cancelled. Planes are over-booked by approximately 1 ...
... There are 6 hubs each of which is completely connected to the others with 1 flight per hour 18 hours per day. Each of the 6 hubs is connected to about 6 non-hub cities with 1 flight every 2 hours 18 hours per day. About 30% of all reservations are cancelled. Planes are over-booked by approximately 1 ...
Chapter 22: Distribute Databases
... At any point, at least one site must be up. At most K sites (participants as well as coordinator) can fail Phase 1: Obtaining Preliminary Decision: Identical to 2PC Phase 1. Every site is ready to commit if instructed to do so Phase 2 of 2PC is split into 2 phases, Phase 2 and Phase 3 of 3PC I ...
... At any point, at least one site must be up. At most K sites (participants as well as coordinator) can fail Phase 1: Obtaining Preliminary Decision: Identical to 2PC Phase 1. Every site is ready to commit if instructed to do so Phase 2 of 2PC is split into 2 phases, Phase 2 and Phase 3 of 3PC I ...
Chapter 9 - Personal.kent.edu
... • This ensures that the transaction completes everything it intended to do before saving the changes. ...
... • This ensures that the transaction completes everything it intended to do before saving the changes. ...
SQL/MX Quick Start - HPE Support Center
... The OSS installation script, setmxdb, creates and populates the sample database and is provided as a pax file, T0517PAX, in the temporary OSS installation subvolume $SYSTEM.ZOSSUTL. The pax file is a multifile archive file that is created by the pax utility on UNIX-compatible systems. For OSS, pax f ...
... The OSS installation script, setmxdb, creates and populates the sample database and is provided as a pax file, T0517PAX, in the temporary OSS installation subvolume $SYSTEM.ZOSSUTL. The pax file is a multifile archive file that is created by the pax utility on UNIX-compatible systems. For OSS, pax f ...
Selecting Actions for Resource-bounded Information Extraction
... lead to immediate reward, but they are necessary to perform before download and extract actions, which may lead to positive rewards. Hence, we need a method that models delayed rewards effectively. We propose the use of temporal difference q-learning to learn the value function for selecting the bes ...
... lead to immediate reward, but they are necessary to perform before download and extract actions, which may lead to positive rewards. Hence, we need a method that models delayed rewards effectively. We propose the use of temporal difference q-learning to learn the value function for selecting the bes ...
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.