OODB_I Lecture 9 - Computing at Northumbria
... Very easy to compare because both are based on Relational Model. An RDB does not support abstract data types (ADT), all attribute values must be atomic and relations must be in first normal form (flat relation). An ORDB supports ADTs, attributes can be multivalued, and does not require first normal ...
... Very easy to compare because both are based on Relational Model. An RDB does not support abstract data types (ADT), all attribute values must be atomic and relations must be in first normal form (flat relation). An ORDB supports ADTs, attributes can be multivalued, and does not require first normal ...
Petabyte Scale Data at Facebook
... Evaluate OLTP databases that scales linearly with the number of cps ...
... Evaluate OLTP databases that scales linearly with the number of cps ...
Slide 1
... • Normalization is the process of creating table designs by assigning specific fields or attributes to each table in the database • Normalization involves applying a set of rules that can help you identify and correct inherent problems and complexities in your table designs • The normalization proc ...
... • Normalization is the process of creating table designs by assigning specific fields or attributes to each table in the database • Normalization involves applying a set of rules that can help you identify and correct inherent problems and complexities in your table designs • The normalization proc ...
Lecture Slides
... The parameter being queried (date) does not have an index in the array, so we need to use the alias “AS” to assign an index that we can use to retrieve from the result array ...
... The parameter being queried (date) does not have an index in the array, so we need to use the alias “AS” to assign an index that we can use to retrieve from the result array ...
slides
... People need weird mappings and fixups for database design anti-patterns. We need an accepted mapping benchmark which reflects this. First approach: THALIA testbed. ...
... People need weird mappings and fixups for database design anti-patterns. We need an accepted mapping benchmark which reflects this. First approach: THALIA testbed. ...
PPT Template
... © 2012 Invensys. All Rights Reserved. The names, logos, and taglines identifying the products and services of Invensys are proprietary marks of Invensys or its subsidiaries. All third party trademarks and service marks are the proprietary marks of their respective owners. ...
... © 2012 Invensys. All Rights Reserved. The names, logos, and taglines identifying the products and services of Invensys are proprietary marks of Invensys or its subsidiaries. All third party trademarks and service marks are the proprietary marks of their respective owners. ...
Lecture23 - The University of Texas at Dallas
... EIP differs from say a well-developed content managed intranet with respect to “personalization”. ...
... EIP differs from say a well-developed content managed intranet with respect to “personalization”. ...
Data Management and Manipulation: Examples for Normalized Databases and Spreadsheets
... Combining data from two datasets is straight forward as long as the records in each data file have the same primary keys (ie. fields which uniquely identify each row). This is a "one to one" merge. It is also straight forward when only one of the fIles has multiple occurrences of the primary keyes) ...
... Combining data from two datasets is straight forward as long as the records in each data file have the same primary keys (ie. fields which uniquely identify each row). This is a "one to one" merge. It is also straight forward when only one of the fIles has multiple occurrences of the primary keyes) ...
Secure kNN Query Pro..
... of the client is a new research problem. It shows increasing importance as cloud computing drives more businesses to outsource their data and querying services. However, most existing studies, including those on data outsourcing, address the data privacy and query privacy separately and cannot be ap ...
... of the client is a new research problem. It shows increasing importance as cloud computing drives more businesses to outsource their data and querying services. However, most existing studies, including those on data outsourcing, address the data privacy and query privacy separately and cannot be ap ...
Databases - Entity-Relationship Modelling Database Design
... the nice neat diagram of the 6 phases is really an iterative process where each stage feeds back to the previous stages. One of the major causes of design alterations is incomplete requirements analysis — this is frequently attributed to users not being aware of the possibilities until they start us ...
... the nice neat diagram of the 6 phases is really an iterative process where each stage feeds back to the previous stages. One of the major causes of design alterations is incomplete requirements analysis — this is frequently attributed to users not being aware of the possibilities until they start us ...
As part of their skills development candidates should have sufficient
... To produce a system that will satisfy an organisation’s information needs requires a different approach from that of file-based systems, where the work is driven by the application needs of individual departments. For the database approach to succeed, the organisation must consider the data first a ...
... To produce a system that will satisfy an organisation’s information needs requires a different approach from that of file-based systems, where the work is driven by the application needs of individual departments. For the database approach to succeed, the organisation must consider the data first a ...
Database Engineering from the Category Theory - CEUR
... Historically the first database approach which solved the inconsistencies, redundancy, concurrency and other problems was the relational model. C. J. Date in his Introduction [13] deals with the relational approach to represent data (i.e. relational data modeling and storing among other aspects). Ot ...
... Historically the first database approach which solved the inconsistencies, redundancy, concurrency and other problems was the relational model. C. J. Date in his Introduction [13] deals with the relational approach to represent data (i.e. relational data modeling and storing among other aspects). Ot ...
IRF2000 IWL3000 SRC1000 Application Note - Apps with - ads-tec
... Industrie 4.0, The Internet of Things or Big-Data. This guide will lead you through an example of how to use the Big-LinX Distributed Condition Monitoring with WWH Data Push together with a custom OSGi Java Application on the IRF2000. Since the storage on all embedded devices is always limited and s ...
... Industrie 4.0, The Internet of Things or Big-Data. This guide will lead you through an example of how to use the Big-LinX Distributed Condition Monitoring with WWH Data Push together with a custom OSGi Java Application on the IRF2000. Since the storage on all embedded devices is always limited and s ...
Web server
... • Provides a means of reading a forward-only stream of rows from a SQL Server database. – Has properties like HasRows, FieldCount – Methods for getting column values of current row, depending on type. – Read method to move to next row. – Very efficient way and preferred if only reading ...
... • Provides a means of reading a forward-only stream of rows from a SQL Server database. – Has properties like HasRows, FieldCount – Methods for getting column values of current row, depending on type. – Read method to move to next row. – Very efficient way and preferred if only reading ...
ReportLab Diagra Tutorial
... 4. edit the second association to pull in the numbers, like this: element01 = DataAssociation(column=2, target='chart.data', assocType='vector') 5. edit the third to bring in the labels, like this: element02 = DataAssociation(column=1, target='chart.labels', assocType='vector') 6. Go back to the dra ...
... 4. edit the second association to pull in the numbers, like this: element01 = DataAssociation(column=2, target='chart.data', assocType='vector') 5. edit the third to bring in the labels, like this: element02 = DataAssociation(column=1, target='chart.labels', assocType='vector') 6. Go back to the dra ...
Relational Database Design - Department of Computer Science and
... a functional dependency α→ β to decompose a relation schema r(α, β, γ) into r1(α, β) and r2(α, γ). Give an example of an inconsistency that can arise due to an erroneous update, if the foreign-key constraint were not enforced on the decomposed relations. ...
... a functional dependency α→ β to decompose a relation schema r(α, β, γ) into r1(α, β) and r2(α, γ). Give an example of an inconsistency that can arise due to an erroneous update, if the foreign-key constraint were not enforced on the decomposed relations. ...
Oracle Active Data Guard Best Practices Standby For More Than
... • NONE = queries will be executed regardless of the apply lag on that database. (Default) • Non-zero = queries will be executed only if the apply lag is less than or equal to STANDBY_MAX_DATA_DELAY. • If delay setting exceeded an error is returned ORA-03172: STANDBY_MAX_DATA_DELAY of 2 seconds excee ...
... • NONE = queries will be executed regardless of the apply lag on that database. (Default) • Non-zero = queries will be executed only if the apply lag is less than or equal to STANDBY_MAX_DATA_DELAY. • If delay setting exceeded an error is returned ORA-03172: STANDBY_MAX_DATA_DELAY of 2 seconds excee ...
Performance Extracts from Books Online
... managed internally by system software and are acquired and released based on actions taken by the user. Microsoft® SQL Server™ 2000 uses locks to implement pessimistic concurrency control among multiple users performing modifications in a database at the same time. By default, SQL Server manages bot ...
... managed internally by system software and are acquired and released based on actions taken by the user. Microsoft® SQL Server™ 2000 uses locks to implement pessimistic concurrency control among multiple users performing modifications in a database at the same time. By default, SQL Server manages bot ...
10 Administration
... • There are 3 procedures that check the system “metadata” in addition to SP_IQCHECKDB • These are – SP_IQDBSIZE – SP_IQTABLESIZE – SP_IQINDEXSIZE ...
... • There are 3 procedures that check the system “metadata” in addition to SP_IQCHECKDB • These are – SP_IQDBSIZE – SP_IQTABLESIZE – SP_IQINDEXSIZE ...
BNL_STATUS_PIC_WSHOP
... Apply process got stuck could not write data into the database. At this moment, backup process was running this could cause some resource contention at the OS level. Database user service was not affected. Workaround: Isolate stream process on one node and run RMAN backups on different node. This is ...
... Apply process got stuck could not write data into the database. At this moment, backup process was running this could cause some resource contention at the OS level. Database user service was not affected. Workaround: Isolate stream process on one node and run RMAN backups on different node. This is ...
The Lisbon Team - 8 December 2003 The CondDBTable What is the
... What do we have: An API that knows how to read the structure of the objects stored in the Database Database partitioning from the API ex: data_tbl_3_1, data_tbl_3_2, .... (for folder /cal/EM/Calib, different times) this is not what BaBar calls partitions Restricted Transient model to support the Rel ...
... What do we have: An API that knows how to read the structure of the objects stored in the Database Database partitioning from the API ex: data_tbl_3_1, data_tbl_3_2, .... (for folder /cal/EM/Calib, different times) this is not what BaBar calls partitions Restricted Transient model to support the Rel ...
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.