Executive Information System And Data Warehouse
... database structure. The structures used for transaction processing may not be well suited to data warehouses because the requirements of the two types of computing are quite different from one another. Data warehouses usually use the relational structure or the multidimensional structure. Before pla ...
... database structure. The structures used for transaction processing may not be well suited to data warehouses because the requirements of the two types of computing are quite different from one another. Data warehouses usually use the relational structure or the multidimensional structure. Before pla ...
CS257_Sec1_118_PPT2_Chapter_15.1
... • If Relation R is clustered, i.e. it is stored in approximately B blocks then the total number of disk operations required is B • If R is clustered but requires a two phase multi way merge sort then the total number of disk i/o required will be 3B. • However, if R is not clustered, then the number ...
... • If Relation R is clustered, i.e. it is stored in approximately B blocks then the total number of disk operations required is B • If R is clustered but requires a two phase multi way merge sort then the total number of disk i/o required will be 3B. • However, if R is not clustered, then the number ...
Sonoma_2008_Tues_sonoma_2008_0408 Oracle
... • Multiple Instances • One Database • SGA database memory of all instances aggregated and appears as one single database to applications through Cache Fusion. ...
... • Multiple Instances • One Database • SGA database memory of all instances aggregated and appears as one single database to applications through Cache Fusion. ...
Oracle Database 10g Performance Overview
... Materialized views are schema objects that can be used to summarize, pre-compute, replicate, and distribute data. They are suitable in many computing environments, such as data warehousing, decision support, and distributed or mobile computing. In a data warehousing application, for example, users o ...
... Materialized views are schema objects that can be used to summarize, pre-compute, replicate, and distribute data. They are suitable in many computing environments, such as data warehousing, decision support, and distributed or mobile computing. In a data warehousing application, for example, users o ...
Storing and Processing Temporal Data in a Main Memory Column
... Driven by the superior performance of in-memory databases and the increasing amount of available memory, SAP HANA follows another approach: We keep all data (both current and temporal) in main memory. Adding distribution and compression to the picture, HANA is already able to handle temporal queries ...
... Driven by the superior performance of in-memory databases and the increasing amount of available memory, SAP HANA follows another approach: We keep all data (both current and temporal) in main memory. Adding distribution and compression to the picture, HANA is already able to handle temporal queries ...
4_sql_recovery_1
... operation (a query or a transaction) is transaction set consistent if all its reads return data written by the same set of committed transactions. An operation is not transaction set consistent if some reads reflect the changes of one set of transactions and other reads reflect changes made by other ...
... operation (a query or a transaction) is transaction set consistent if all its reads return data written by the same set of committed transactions. An operation is not transaction set consistent if some reads reflect the changes of one set of transactions and other reads reflect changes made by other ...
Database Transactions and Processess
... Assume deadlock when transactions waits longer than time-out period Manual locking Manual lock release when finished accessing item. Better performance, but due to early lock release non-serializable schedules are possible. Two-phase locking Transaction doesn‟t release lock until it has all locks it ...
... Assume deadlock when transactions waits longer than time-out period Manual locking Manual lock release when finished accessing item. Better performance, but due to early lock release non-serializable schedules are possible. Two-phase locking Transaction doesn‟t release lock until it has all locks it ...
Index A Guide to the Index
... Index A Guide to the Index The index is arranged hierarchically, in alphabetical order, with symbols preceding the letter A. Most second-level entries and many third-level entries also occur as first-level entries. This is to ensure that users will find the information they require however they choo ...
... Index A Guide to the Index The index is arranged hierarchically, in alphabetical order, with symbols preceding the letter A. Most second-level entries and many third-level entries also occur as first-level entries. This is to ensure that users will find the information they require however they choo ...
Document
... db_pointer is made to point to the updated shadow copy after – the transaction reaches partial commit and – all updated pages have been flushed to disk. ...
... db_pointer is made to point to the updated shadow copy after – the transaction reaches partial commit and – all updated pages have been flushed to disk. ...
BCS THE CHARTERED INSTITUTE FOR IT DATABASE SYSTEMS BCS HIGHER EDUCATION QUALIFICATIONS
... If you add a new item to the table and make a mistake in the description, then you may end up with (e.g.) two different descriptions for the same item. (2 marks) Modification Anomaly If the description of an item changes, and if you neglect to change all the descriptions, then the table will contain ...
... If you add a new item to the table and make a mistake in the description, then you may end up with (e.g.) two different descriptions for the same item. (2 marks) Modification Anomaly If the description of an item changes, and if you neglect to change all the descriptions, then the table will contain ...
Database Design
... This week you will learn that the purpose of a database is to keep track of data and that a database stores information that is more complicated than that in a simple list or a even a spreadsheet. A relational database stores information in tables. Each informational topic is stored in its own table ...
... This week you will learn that the purpose of a database is to keep track of data and that a database stores information that is more complicated than that in a simple list or a even a spreadsheet. A relational database stores information in tables. Each informational topic is stored in its own table ...
A system for conceptual and logical database design
... consequences of an unsuitable structure are the unmeasurable expenses for its modification which must be realized as soon as the inconsistency of this structure is found. Hence, one important factor in the exploration of database is the existence of a methodology and a software which can be used for ...
... consequences of an unsuitable structure are the unmeasurable expenses for its modification which must be realized as soon as the inconsistency of this structure is found. Hence, one important factor in the exploration of database is the existence of a methodology and a software which can be used for ...
The Relational Data Model Data and Its Structure Physical Data
... A view is computed when accessed (not stored). Different external schemas can be provided to different categories of users. Translation from external to conceptual done automatically by DBMS at run time. Conceptual schema can be changed without changing application: Mapping from external to conceptu ...
... A view is computed when accessed (not stored). Different external schemas can be provided to different categories of users. Translation from external to conceptual done automatically by DBMS at run time. Conceptual schema can be changed without changing application: Mapping from external to conceptu ...
Oracle interMedia
... Java stored procedures offer flexibility Facilitate transport of code between tiers Allow use of standard Java libraries One example: ...
... Java stored procedures offer flexibility Facilitate transport of code between tiers Allow use of standard Java libraries One example: ...
Database Management
... Databases, Data, and Information • Data integrity identifies the quality of the data • Garbage in, garbage out (GIGO) points out the accuracy of a computer’s output depends on the accuracy of the input ...
... Databases, Data, and Information • Data integrity identifies the quality of the data • Garbage in, garbage out (GIGO) points out the accuracy of a computer’s output depends on the accuracy of the input ...
Databases, Data, and Information
... Databases, Data, and Information • Data integrity identifies the quality of the data • Garbage in, garbage out (GIGO) points out the accuracy of a computer’s output depends on the accuracy of the input ...
... Databases, Data, and Information • Data integrity identifies the quality of the data • Garbage in, garbage out (GIGO) points out the accuracy of a computer’s output depends on the accuracy of the input ...
Database Management Systems
... Databases, Data, and Information • Data integrity identifies the quality of the data • Garbage in, garbage out (GIGO) points out the accuracy of a computer’s output depends on the accuracy of the input ...
... Databases, Data, and Information • Data integrity identifies the quality of the data • Garbage in, garbage out (GIGO) points out the accuracy of a computer’s output depends on the accuracy of the input ...
Intro_to_IO_Monitoring_-_Counters_That_Count_
... EverGuard, SanDisk ION Accelerator, Fusion ioMemory, Fusion ioSphere, Fusion ioTurbine, Fusion ioVDI, and others are trademarks of SanDisk Enterprise IP LLC. Other brand names mentioned herein are for identification purposes only and may be the trademarks of their respective holder(s). ...
... EverGuard, SanDisk ION Accelerator, Fusion ioMemory, Fusion ioSphere, Fusion ioTurbine, Fusion ioVDI, and others are trademarks of SanDisk Enterprise IP LLC. Other brand names mentioned herein are for identification purposes only and may be the trademarks of their respective holder(s). ...
Chapter 7: Relational Database Design
... Several algorithms can reduce disk IO by using extra buffer ...
... Several algorithms can reduce disk IO by using extra buffer ...
Finding Time: SAS® and Data Warehouse Solutions for Determining Last Day of the Month
... We use production reports to monitor performance of the portfolio or response to a campaign on an ongoing basis. We also run production jobs to create data sets as input files for other systems. These reports or files are produced on a monthly basis where only the most recent month’s data need to be ...
... We use production reports to monitor performance of the portfolio or response to a campaign on an ongoing basis. We also run production jobs to create data sets as input files for other systems. These reports or files are produced on a monthly basis where only the most recent month’s data need to be ...