The SAS System in a Data Warehouse Environment
... one-ta-one correspondence to operational data sources. The steps in defining a subject are 1) conduct user and management interviews 2) build the logical data model and 3) from the logical data model, build the physical data model. In an OLTP environment, data is organized around a particular busine ...
... one-ta-one correspondence to operational data sources. The steps in defining a subject are 1) conduct user and management interviews 2) build the logical data model and 3) from the logical data model, build the physical data model. In an OLTP environment, data is organized around a particular busine ...
Database Systems - University of Texas at Dallas
... – Physically create a temporary view table when the view is first queried – Keep that table on the assumption that other queries on the view will follow – Requires efficient strategy for automatically updating the view table when the base tables are updated ...
... – Physically create a temporary view table when the view is first queried – Keep that table on the assumption that other queries on the view will follow – Requires efficient strategy for automatically updating the view table when the base tables are updated ...
database system
... our list into several tables. Somehow the tables must be joined back together • In a relational database, tables are joined together using the value of the data • If a PROJECT has a CUSTOMER, the Customer_ID is stored as a column in the PROJECT table. The value stored in this column can be used to r ...
... our list into several tables. Somehow the tables must be joined back together • In a relational database, tables are joined together using the value of the data • If a PROJECT has a CUSTOMER, the Customer_ID is stored as a column in the PROJECT table. The value stored in this column can be used to r ...
Consistency Constraints in Database Middleware
... technical perspective, the means to check and enforce consistency constraints are usually restricted due to autonomy of data sources. In consequence, the middleware DBA might not have the authority to prevent the storage of inconsistent data in the data sources. Many of the (database middleware) app ...
... technical perspective, the means to check and enforce consistency constraints are usually restricted due to autonomy of data sources. In consequence, the middleware DBA might not have the authority to prevent the storage of inconsistent data in the data sources. Many of the (database middleware) app ...
CAA2014 21st century Archeaology - Université Paris 1 Panthéon
... The project ‘Ancient Lucania: archaeology and national heritage’ aims at investigating the process of Lucanian ethnogenesis using, beside texts, an archaeological approach. In order to achieve this project, we are compiling both a ‘Gazetteer of archaeological sites of ancient Lucania’ and an ‘Invent ...
... The project ‘Ancient Lucania: archaeology and national heritage’ aims at investigating the process of Lucanian ethnogenesis using, beside texts, an archaeological approach. In order to achieve this project, we are compiling both a ‘Gazetteer of archaeological sites of ancient Lucania’ and an ‘Invent ...
slides - CIS @ Temple University
... Suppose the user, instead of entering a name, enters: X’ or ’Y’ = ’Y then the resulting statement becomes: "select * from instructor where name = ’" + "X’ or ’Y’ = ’Y" + "’" which is: select * from instructor where name = ’X’ or ’Y’ = ’Y’ ...
... Suppose the user, instead of entering a name, enters: X’ or ’Y’ = ’Y then the resulting statement becomes: "select * from instructor where name = ’" + "X’ or ’Y’ = ’Y" + "’" which is: select * from instructor where name = ’X’ or ’Y’ = ’Y’ ...
Oracle Change Data Capture - New York Oracle User Group
... * Zero additional license cost over Oracle10g EE Virtually zero source system processing cost Oracle Corporation ...
... * Zero additional license cost over Oracle10g EE Virtually zero source system processing cost Oracle Corporation ...
Best Practices - Pivotal Greenplum Database Documentation
... Greenplum Database Best Practices Guide describes best practices for Greenplum Database. A best practice is a method or technique that has consistently shown results superior to those achieved with other means. Best practices are found through experience and are proven to reliably lead to a desired ...
... Greenplum Database Best Practices Guide describes best practices for Greenplum Database. A best practice is a method or technique that has consistently shown results superior to those achieved with other means. Best practices are found through experience and are proven to reliably lead to a desired ...
Gr8AmbitionZ.com
... Q.41 E-R model uses this symbol to represent weak entity set ? (A) Dotted rectangle. (B) Diamond (C) Doubly outlined rectangle ...
... Q.41 E-R model uses this symbol to represent weak entity set ? (A) Dotted rectangle. (B) Diamond (C) Doubly outlined rectangle ...
Oracle for Developer
... • Most Indexes in complex OLTP (e.g. ERP) databases are only used for analytic queries • Inserting one row into a table requires updating 10-20 analytic indexes: Slow! • Indexes only speed up predictable queries & reports ...
... • Most Indexes in complex OLTP (e.g. ERP) databases are only used for analytic queries • Inserting one row into a table requires updating 10-20 analytic indexes: Slow! • Indexes only speed up predictable queries & reports ...
The SAS System in a Data Warehouse Environment
... operational data stores. From the SAS System's point of view. this refers to the family of SAS/Access® Software. SASJAccess software is an expression of SAS Institute's Multiple Engine Architecture (MEA) which uses a layered YO mode! to abstract from SAS application logic the physical properties and ...
... operational data stores. From the SAS System's point of view. this refers to the family of SAS/Access® Software. SASJAccess software is an expression of SAS Institute's Multiple Engine Architecture (MEA) which uses a layered YO mode! to abstract from SAS application logic the physical properties and ...
Ontology materialization from relational database sources using D2RQ
... Customization is very direct in the case where a class in the ontology is represented by a table in the database. Mapping is complicated or sometimes not possible when a class in the ontology is not a table in the database, but a record in a database table. ...
... Customization is very direct in the case where a class in the ontology is represented by a table in the database. Mapping is complicated or sometimes not possible when a class in the ontology is not a table in the database, but a record in a database table. ...
FROM employees
... Entity Relationship Model • Scenario – “. . . Assign one or more employees to a department . . .” – “. . . Some departments do not yet have assigned employees . . .” ...
... Entity Relationship Model • Scenario – “. . . Assign one or more employees to a department . . .” – “. . . Some departments do not yet have assigned employees . . .” ...
MS 2780: Maintaining a Microsoft SQL Server 2005 Database
... Pricing, specifications, availability, and terms of offers may change without notice. Taxes, fees, shipping, handling and any applicable restocking charges are extra, and vary. Training Services new purchases only. Dell cannot be responsible for pricing or other errors, and reserves the right to can ...
... Pricing, specifications, availability, and terms of offers may change without notice. Taxes, fees, shipping, handling and any applicable restocking charges are extra, and vary. Training Services new purchases only. Dell cannot be responsible for pricing or other errors, and reserves the right to can ...
Why Unisys and MISER? - the MISER Users Group
... This protection exceeds the current state-of-the-art in systems designed to meet the needs of the commodity computing market. The MCP operating environment also provides security protections by using trusted program compilers. These programs, necessary to create new programs make the creation of uns ...
... This protection exceeds the current state-of-the-art in systems designed to meet the needs of the commodity computing market. The MCP operating environment also provides security protections by using trusted program compilers. These programs, necessary to create new programs make the creation of uns ...
InfoSphere CDC – How to Perform Initial Table Synchronization
... because of the high parallelism within the tool. However, we need to understand how to transition from the initial ETL load to normal InfoSphere CDC ‘mirroring’. Some of the considerations include operations that occur during the ETL load and also determining the bookmark or log position to start fr ...
... because of the high parallelism within the tool. However, we need to understand how to transition from the initial ETL load to normal InfoSphere CDC ‘mirroring’. Some of the considerations include operations that occur during the ETL load and also determining the bookmark or log position to start fr ...
Computers: Understanding Technology, 3e
... Database Administration Data Integrity – data integrity – the accuracy of information provided to database users – redundancy – duplication of data in several fields; an enemy of data integrity – normalization – prevents duplicate data storage and reduces chance that some data will not be updated w ...
... Database Administration Data Integrity – data integrity – the accuracy of information provided to database users – redundancy – duplication of data in several fields; an enemy of data integrity – normalization – prevents duplicate data storage and reduces chance that some data will not be updated w ...
10-realSQL
... Disks Secondary storage device of choice. Main advantage over tapes: random access vs. sequential. Data is stored and retrieved in units called disk blocks or pages. Unlike RAM, time to retrieve a disk page varies depending upon location on disk. ...
... Disks Secondary storage device of choice. Main advantage over tapes: random access vs. sequential. Data is stored and retrieved in units called disk blocks or pages. Unlike RAM, time to retrieve a disk page varies depending upon location on disk. ...
File Structures
... – Avoid multiple concepts within one relation • Can lead to redundant data • Deleting a tuple could also delete necessary but ...
... – Avoid multiple concepts within one relation • Can lead to redundant data • Deleting a tuple could also delete necessary but ...
Customer
... – For each sales rep with fewer than four customers, list the rep number, the number of customers assigned to the rep, and the average balance of the rep’s customers. Rename the count of the number of customers and the average of the balances to NumOfCustomers and AverageBalance. – Use of “Having” c ...
... – For each sales rep with fewer than four customers, list the rep number, the number of customers assigned to the rep, and the average balance of the rep’s customers. Rename the count of the number of customers and the average of the balances to NumOfCustomers and AverageBalance. – Use of “Having” c ...
Intro to Databases and MySQL - Faculty
... NULL Data Types • In many cases, users need to have the option of leaving a field in a record blank. This is done by setting the field's value to NULL. • NULL is the term used to represent a missing value. It is not the same as a 0 or a blank. • NULL is also important when accessing or modifying da ...
... NULL Data Types • In many cases, users need to have the option of leaving a field in a record blank. This is done by setting the field's value to NULL. • NULL is the term used to represent a missing value. It is not the same as a 0 or a blank. • NULL is also important when accessing or modifying da ...
ch5
... If tuple t = is a tuple (row) in the
relation state r of R(A1, A2, …, An)
Then each vi must be a value from dom(Ai)
...
... If tuple t =
Advanced PL/SQL Programming
... – A pointer to the context area – Called so, because you do not need to write code to explicitly create the cursor or retrieve its values – Used to assign output of SELECT query to PL/SQL program variables when query will return only one record* * Error occurs if query returns no records or more tha ...
... – A pointer to the context area – Called so, because you do not need to write code to explicitly create the cursor or retrieve its values – Used to assign output of SELECT query to PL/SQL program variables when query will return only one record* * Error occurs if query returns no records or more tha ...
