gis databases - UMM Directory
... – a good design results in a database which: • contains necessary data but no redundant data • organises data so that different users access the same ...
... – a good design results in a database which: • contains necessary data but no redundant data • organises data so that different users access the same ...
Ch 1: Your Future and Computer Competency
... – Disadvantage: Cross-referencing across the files is needed for detailed reporting – Benefit: Data duplication is minimized which removes the updation anomalies ...
... – Disadvantage: Cross-referencing across the files is needed for detailed reporting – Benefit: Data duplication is minimized which removes the updation anomalies ...
Analytical Model for Performance Measurement of Queueing Systems
... The most recent backup copy of the database is mounted and all transactions(stored on transaction log) that have occurred since the copy are rerun. ...
... The most recent backup copy of the database is mounted and all transactions(stored on transaction log) that have occurred since the copy are rerun. ...
Physical Data Modelling - itsy.co.uk
... development if your Logical Data Model is NOT demonstrably ‘robust’. data to be stored (& maintained) in structured manner; i.e. MUST be an ‘accurate’ implementation of the logical data model. retrieval of specific groupings of data; i.e. in order to provide the information REQUIRED by the original ...
... development if your Logical Data Model is NOT demonstrably ‘robust’. data to be stored (& maintained) in structured manner; i.e. MUST be an ‘accurate’ implementation of the logical data model. retrieval of specific groupings of data; i.e. in order to provide the information REQUIRED by the original ...
Here - Emunix Emich
... If the system crashes before a fund transfer transaction completes its execution, then either one or both accounts may have incorrect value. Thus, the database must be restored to the state before the transaction modified any of the accounts. ...
... If the system crashes before a fund transfer transaction completes its execution, then either one or both accounts may have incorrect value. Thus, the database must be restored to the state before the transaction modified any of the accounts. ...
Courtesy Affymetrix Inc. - Oracle Software Downloads
... No standard industry data models or best practices ...
... No standard industry data models or best practices ...
Chapter 3
... created by Microsoft Access for the query. (While viewing the Query Grid, click on View on the menu, Click on SQL View.) 2. Display the Item ID, Item Name, and Item Price for all items that cost more than $50. Sort the records in ascending order based on the Item Name. Save the query as ItemSort. Vi ...
... created by Microsoft Access for the query. (While viewing the Query Grid, click on View on the menu, Click on SQL View.) 2. Display the Item ID, Item Name, and Item Price for all items that cost more than $50. Sort the records in ascending order based on the Item Name. Save the query as ItemSort. Vi ...
Cubrick: A Scalable Distributed MOLAP Database for Fast Analytics
... than the ones used in the sort order. A second approach to deal with analytical workloads is to use a multidimensional model, also known as data cubes, modeling data in terms of dimensions, metrics and aggregations. MOLAP databases, in contrast to ROLAP systems that suffer from the previously stated ...
... than the ones used in the sort order. A second approach to deal with analytical workloads is to use a multidimensional model, also known as data cubes, modeling data in terms of dimensions, metrics and aggregations. MOLAP databases, in contrast to ROLAP systems that suffer from the previously stated ...
pobierz plik referatu
... that smallest possible number of mappings is needed to retrieve objects based on their OID (Object Identifier). The storage also needs to keep track of objects and metadata stored in one instance of database engine which ensures consistency of data. We also have to resolve problems concerning effici ...
... that smallest possible number of mappings is needed to retrieve objects based on their OID (Object Identifier). The storage also needs to keep track of objects and metadata stored in one instance of database engine which ensures consistency of data. We also have to resolve problems concerning effici ...
Slides - SEAS - University of Pennsylvania
... Transaction : an atomic sequence of database actions (read/write) on data items (e.g. calendar entry) Recoverability via a log: keeping track of all actions carried out by the database How do distributed systems, Web services, serviceoriented architectures, and the like affect these properties ...
... Transaction : an atomic sequence of database actions (read/write) on data items (e.g. calendar entry) Recoverability via a log: keeping track of all actions carried out by the database How do distributed systems, Web services, serviceoriented architectures, and the like affect these properties ...
投影片 1
... Most data models also include a set of basic operations for specifying retrievals and updates on the database ...
... Most data models also include a set of basic operations for specifying retrievals and updates on the database ...
MGS351 - Microsoft Access 2010 Ch 7
... Automatically “looks up” data based on a primary key Tables used in query must have a one-to-many relationship Join field in the query must be taken from the many side ...
... Automatically “looks up” data based on a primary key Tables used in query must have a one-to-many relationship Join field in the query must be taken from the many side ...
Lecture 3: Hash indexing, index selection
... • Virtual hash table has no overflows - may need to increase in size. • Physical hash table has no overflows. • Virtual hash table is as small as possible may need to shrink. • ”Compression”: For any bit string s, if we consider the virtual hash table blocks whose index ends with s then either: – Th ...
... • Virtual hash table has no overflows - may need to increase in size. • Physical hash table has no overflows. • Virtual hash table is as small as possible may need to shrink. • ”Compression”: For any bit string s, if we consider the virtual hash table blocks whose index ends with s then either: – Th ...
LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
... 1. What is a database? Explain with an illustration. 2. Write any four major sectors in which Database concepts applied very much. 3. Define Data Manipulation Language. 4. What is meant by Entity-Relationship Model? Explain by an example 5. Define Physical Data Independence in DBMS and give an examp ...
... 1. What is a database? Explain with an illustration. 2. Write any four major sectors in which Database concepts applied very much. 3. Define Data Manipulation Language. 4. What is meant by Entity-Relationship Model? Explain by an example 5. Define Physical Data Independence in DBMS and give an examp ...
Oracle Database 10g: Administration Workshop I
... This practice covers the following topics: • Configuring your database for backups • Backing up your database while the database is open for user activity • Scheduling automatic nightly incremental backups for your database ...
... This practice covers the following topics: • Configuring your database for backups • Backing up your database while the database is open for user activity • Scheduling automatic nightly incremental backups for your database ...
Apoorv Kumar and Apul
... Relational model is a collection of tables representing an E‐R database schema. For each entity set and for each relationship set in the database, there is a unique table having the name of the corresponding entity set or relationship set. Each table has multiple columns which correspond to attrib ...
... Relational model is a collection of tables representing an E‐R database schema. For each entity set and for each relationship set in the database, there is a unique table having the name of the corresponding entity set or relationship set. Each table has multiple columns which correspond to attrib ...
Oracle Database 10g: Administration Workshop I
... backup solution expedites problem resolution. This ensures reliable data protection at lower cost and complexity. ...
... backup solution expedites problem resolution. This ensures reliable data protection at lower cost and complexity. ...
Double-Take ® SHARE 5.0
... Alpha-numeric (10) Alpha-numeric (25) Alpha-numeric (25) Alpha-numeric (25) Alpha-numeric (25) Alpha-numeric (25) Numeric (10) Numeric (10,2) ...
... Alpha-numeric (10) Alpha-numeric (25) Alpha-numeric (25) Alpha-numeric (25) Alpha-numeric (25) Alpha-numeric (25) Numeric (10) Numeric (10,2) ...
JAVA DATABASE CONNECTIVITY (JDBC)
... A relational database is a logical representation of data that allows the data to be accessed without consideration of its physical structure. A relational database stores data in tables. ...
... A relational database is a logical representation of data that allows the data to be accessed without consideration of its physical structure. A relational database stores data in tables. ...
Database Edition for Oracle Performance
... Up to 200% performance increase over running Oracle on traditional buffered file system Enables HP OnlineJFS File System that is an OEM version of VERITAS File System Storage Edition assumes LVM running underneath; Database Edition runs on VxVM Storage Edition supports MC/ServiceGuard; ...
... Up to 200% performance increase over running Oracle on traditional buffered file system Enables HP OnlineJFS File System that is an OEM version of VERITAS File System Storage Edition assumes LVM running underneath; Database Edition runs on VxVM Storage Edition supports MC/ServiceGuard; ...
Transactions - Dr Gordon Russell
... The goal in a ‘concurrent’ DBMS is to allow multiple users to access the database simultaneously without interfering with each other. A problem with multiple users using the DBMS is that it may be possible for two users to try and change data in the database simultaneously. If this type of action is ...
... The goal in a ‘concurrent’ DBMS is to allow multiple users to access the database simultaneously without interfering with each other. A problem with multiple users using the DBMS is that it may be possible for two users to try and change data in the database simultaneously. If this type of action is ...
View File - UET Taxila
... Decide what entities should be part of the application and how they should be linked. Decide on a set of tables, attributes. Define the tables in the database system. Populate database. ...
... Decide what entities should be part of the application and how they should be linked. Decide on a set of tables, attributes. Define the tables in the database system. Populate database. ...
Used to be Chaptet 16
... •Data is a key resource and must be managed and controlled effectively. •Organizations are computerized, thus there is a need to keep data on their current up-to-the-minute state. •Data become more complex so as the relation among them, thus, we need to maintain and modeled such complex relationship ...
... •Data is a key resource and must be managed and controlled effectively. •Organizations are computerized, thus there is a need to keep data on their current up-to-the-minute state. •Data become more complex so as the relation among them, thus, we need to maintain and modeled such complex relationship ...
Subset Extraction [ WEB LAB - Requirements for Subset
... If the user wishes to have the subset on his local system, the entire data will have to be transferred either in the form of a schema or in the form of a list on the user’s interface. If the entire table is very big maybe subsets of this can be fetched from the server by the local system, or maybe t ...
... If the user wishes to have the subset on his local system, the entire data will have to be transferred either in the form of a schema or in the form of a list on the user’s interface. If the entire table is very big maybe subsets of this can be fetched from the server by the local system, or maybe t ...