item_name, color, size
... It suffices to precompute some aggregates, and compute others on demand from one of the precomputed aggregates Can compute aggregate on (item_name, color) from an aggregate on (item_name, color, size) – For all but a few “non-decomposable” aggregates such as median ...
... It suffices to precompute some aggregates, and compute others on demand from one of the precomputed aggregates Can compute aggregate on (item_name, color) from an aggregate on (item_name, color, size) – For all but a few “non-decomposable” aggregates such as median ...
06-Chapter-19-Database-Recovery
... 1. Use two lists of transactions maintained by the system: the committed transactions since the last checkpoint and the active transactions. 2. Undo all the write_item operations of the active (uncommitted) transactions, using the UNDO procedure. The operations should be undone in the reverse of the ...
... 1. Use two lists of transactions maintained by the system: the committed transactions since the last checkpoint and the active transactions. 2. Undo all the write_item operations of the active (uncommitted) transactions, using the UNDO procedure. The operations should be undone in the reverse of the ...
Chapter 3
... Many sites use Oracle to support mission critical applications. A mission-critical application, by definition, has stringent high-availability requirements. Such sites can tolerate little or no downtime due to a server crash. In such circumstances, Oracle's Parallel Server option can help. In a para ...
... Many sites use Oracle to support mission critical applications. A mission-critical application, by definition, has stringent high-availability requirements. Such sites can tolerate little or no downtime due to a server crash. In such circumstances, Oracle's Parallel Server option can help. In a para ...
Advanced Databases
... Atomicity of subtransactions is ensured by local nodes How to ensure the atomicity of the global transaction? • during the execution of the global transaction communication breakdown can occur between one or more nodes or one or more nodes can malfunction • Atomicity of the global transaction means ...
... Atomicity of subtransactions is ensured by local nodes How to ensure the atomicity of the global transaction? • during the execution of the global transaction communication breakdown can occur between one or more nodes or one or more nodes can malfunction • Atomicity of the global transaction means ...
2015 IPS 001 F - RFI - ICT Professional Services 20 04 15 Final
... Expenditure and Reform (DPER), with its own Vote. It commenced operations in 2014 and will, together with four key sectors (Health, Education, Local Government & Defence) take responsibility for sourcing all goods and services on behalf of the public service. The OGP intends to run a competitive pro ...
... Expenditure and Reform (DPER), with its own Vote. It commenced operations in 2014 and will, together with four key sectors (Health, Education, Local Government & Defence) take responsibility for sourcing all goods and services on behalf of the public service. The OGP intends to run a competitive pro ...
Oracle_ch7 - Gonzaga University Student Web Server
... • Database account management is only one facet of data security • A new user account is created with the CREATE USER command – The IDENTIFIED BY clause contains the password for the account • System privileges are used to grant access to the database and to create, alter, and drop database objects ...
... • Database account management is only one facet of data security • A new user account is created with the CREATE USER command – The IDENTIFIED BY clause contains the password for the account • System privileges are used to grant access to the database and to create, alter, and drop database objects ...
Database Programming in SQL/Oracle
... (B, {RO1 : E1 , . . . , ROk : Ek }, {A1 , . . . , An }), where B is the name, {RO1 , . . . , ROk }, k ≥ 2, is a list of roles, {E1 , . . . , Ek } is a list of entity types associated to the roles, and {A1 , . . . , An }, n ≥ 0 is the set of attributes of the relationship type. Roles are pairwise dif ...
... (B, {RO1 : E1 , . . . , ROk : Ek }, {A1 , . . . , An }), where B is the name, {RO1 , . . . , ROk }, k ≥ 2, is a list of roles, {E1 , . . . , Ek } is a list of entity types associated to the roles, and {A1 , . . . , An }, n ≥ 0 is the set of attributes of the relationship type. Roles are pairwise dif ...
Lecture07a
... The book Database System Concepts (4th Edition) by Silberschatz, Korth, and Sudarshan devotes an entire chapter (chapter 19) to Distributed Databases In part 1 of my lecture, I will use slides extracted from the set of slides provided with the book. ...
... The book Database System Concepts (4th Edition) by Silberschatz, Korth, and Sudarshan devotes an entire chapter (chapter 19) to Distributed Databases In part 1 of my lecture, I will use slides extracted from the set of slides provided with the book. ...
unit iii database management systems
... A mapping will need to be created where all the staff in the different categories are combined into one category for the payroll office. The conceptual view would include information about each staff's position, the date employment started, full-time or part- time etc. This will need to be mapped to ...
... A mapping will need to be created where all the staff in the different categories are combined into one category for the payroll office. The conceptual view would include information about each staff's position, the date employment started, full-time or part- time etc. This will need to be mapped to ...
Integrating Data Using Ontology and SSM Fragments
... Managing the vast amounts of information in large computer networks presents a number of difficulties to system users and designers. New applications and databases are created on a regular basis to solve local problems as they arise. For large organizations, it means the number of databases can be s ...
... Managing the vast amounts of information in large computer networks presents a number of difficulties to system users and designers. New applications and databases are created on a regular basis to solve local problems as they arise. For large organizations, it means the number of databases can be s ...
02 Backend Architecture
... top-level interface is IBackendObject which provides a number of attributes common to all objects in the backend. The IEntity, IUser, and IContent classes derive from this, each adding methods specific to users and content. Another interface, IBackendObjectCollection, is also exposed, which not only ...
... top-level interface is IBackendObject which provides a number of attributes common to all objects in the backend. The IEntity, IUser, and IContent classes derive from this, each adding methods specific to users and content. Another interface, IBackendObjectCollection, is also exposed, which not only ...
Honored Guests Database
... Honored Guest Lounge, etc. In general, the SOI staff did not participate in the day-to-day working effort on site during Games. This was the source of much frustration for the GOC staff. Database Suggestions: There should be one person (plus a backup) to run and enter the information into the hono ...
... Honored Guest Lounge, etc. In general, the SOI staff did not participate in the day-to-day working effort on site during Games. This was the source of much frustration for the GOC staff. Database Suggestions: There should be one person (plus a backup) to run and enter the information into the hono ...
kemme - Data Systems Group
... In case of failures: all non-faulty sites commit the same set of transactions a transaction might be committed at a faulty site (shortly before failure) and it is not committed at the other sites. Low message delay ...
... In case of failures: all non-faulty sites commit the same set of transactions a transaction might be committed at a faulty site (shortly before failure) and it is not committed at the other sites. Low message delay ...
Thomas Oommen - SOFF Corporation
... selection like HR interviews, technical tests, technical interviews, final interview and salary negations etc can be recorded using this system. Environment: Visual Interdev, XML, ASP, HTML, JavaScript, VBScript, WinNT, MS-SQL Server 6.5, IIS. POIS (Policy on Intranet System) Feb 1998 – Aug 1998 Ana ...
... selection like HR interviews, technical tests, technical interviews, final interview and salary negations etc can be recorded using this system. Environment: Visual Interdev, XML, ASP, HTML, JavaScript, VBScript, WinNT, MS-SQL Server 6.5, IIS. POIS (Policy on Intranet System) Feb 1998 – Aug 1998 Ana ...
Logging and Recovery
... Consistency: if each Xact is consistent, and the DB starts consistent, it ends up consistent ...
... Consistency: if each Xact is consistent, and the DB starts consistent, it ends up consistent ...
vb notes - VB.NET section
... below (it's on two here because it won't all fit on one line): con.ConnectionString = "PROVIDER=Microsoft.Jet.OLEDB.4.0;Data Source = C:\AddressBook.mdb" The first part specifies which provider technology we want to use to do the connecting (JET). The second part, typed after a semi-colon, points to ...
... below (it's on two here because it won't all fit on one line): con.ConnectionString = "PROVIDER=Microsoft.Jet.OLEDB.4.0;Data Source = C:\AddressBook.mdb" The first part specifies which provider technology we want to use to do the connecting (JET). The second part, typed after a semi-colon, points to ...
Environment Optimization Guide
... learning at your own pace. To view these tutorials, visit the Tutorial page on kcura.com. Documentation - We constantly strive to ensure that all users of Relativity are educated on the full functionality of the platform. To help you and your team stay well informed, we post all documentation on thi ...
... learning at your own pace. To view these tutorials, visit the Tutorial page on kcura.com. Documentation - We constantly strive to ensure that all users of Relativity are educated on the full functionality of the platform. To help you and your team stay well informed, we post all documentation on thi ...
Database Solutions for Storing and Retrieving XML Documents
... VARCHAR respectively in DB2 • XMLFile stores an XML document as a file on a local file system ...
... VARCHAR respectively in DB2 • XMLFile stores an XML document as a file on a local file system ...
Summer 2015, Franck Pachot. The arrival of the
... datafiles so no risk to delete one by mistake. • Do you really have many users who can continue to work when a datafile is offline? We often have only one application per database. All data are linked. We’ll see the multitenant case later. • Don’t you have some failover mechanisms which let you open ...
... datafiles so no risk to delete one by mistake. • Do you really have many users who can continue to work when a datafile is offline? We often have only one application per database. All data are linked. We’ll see the multitenant case later. • Don’t you have some failover mechanisms which let you open ...
Interactive Browsing and Navigation in Relational Databases
... The usability challenge of writing complex queries has been studied by many researchers. Although visual query builders help people formulate SQL queries [13], they separate query construction and result presentation parts [29], introducing a usability gap between users’ actions and their results [4 ...
... The usability challenge of writing complex queries has been studied by many researchers. Although visual query builders help people formulate SQL queries [13], they separate query construction and result presentation parts [29], introducing a usability gap between users’ actions and their results [4 ...
PPT - Electrical and Computer Engineering Department
... a table An element t of r is a tuple, represented by a row in a table ...
... a table An element t of r is a tuple, represented by a row in a table ...