Introduction to Database Systems
... Open Database Connectivity (ODBC) is a native interface that is accessed through a programming language that can make calls into a native library. In MDAC this interface is defined as a DLL. A separate module or driver is needed for each database that must be accessed. ...
... Open Database Connectivity (ODBC) is a native interface that is accessed through a programming language that can make calls into a native library. In MDAC this interface is defined as a DLL. A separate module or driver is needed for each database that must be accessed. ...
Slides (Powerpoint)
... http://toto.lib.unca.edu/findingaids/photo/national_climatic_data_center/NCDC_interior.htm NOAA's National Climatic Data Center is the source of this image and it is used by permission ...
... http://toto.lib.unca.edu/findingaids/photo/national_climatic_data_center/NCDC_interior.htm NOAA's National Climatic Data Center is the source of this image and it is used by permission ...
Intro - Millersville University
... Application program interface (e.g., ODBC/JDBC) which allow SQL queries to be sent to a database ...
... Application program interface (e.g., ODBC/JDBC) which allow SQL queries to be sent to a database ...
essbase aso tuning and optimization for mere mortals
... Don‟t forget about attribute dimensions in aggregate storage databases. Even though we can build a database with 20+ dimensions doesn‟t mean that some of those dimensions wouldn‟t be better served as attribute dimensions. Retrieval time is similar to other hierarchy members and internally they are t ...
... Don‟t forget about attribute dimensions in aggregate storage databases. Even though we can build a database with 20+ dimensions doesn‟t mean that some of those dimensions wouldn‟t be better served as attribute dimensions. Retrieval time is similar to other hierarchy members and internally they are t ...
OVERVIEW OF TRANSACTION MANAGEMENT
... (j) A recoverable schedule is one in which a transaction can commit only after all other transactions whose changes it has read have committed. (k) A schedule that avoids-cascading-aborts is one in which transactions only read the changes of committed transactions. Such a schedule is not only recove ...
... (j) A recoverable schedule is one in which a transaction can commit only after all other transactions whose changes it has read have committed. (k) A schedule that avoids-cascading-aborts is one in which transactions only read the changes of committed transactions. Such a schedule is not only recove ...
Tuning Oracle on Linux Part 2 - Basic IO Concepts
... cooked versus raw file systems, and regular versus journalized file systems. I guarantee that some of the enclosed benchmark results and conclusions will surprise you. ...
... cooked versus raw file systems, and regular versus journalized file systems. I guarantee that some of the enclosed benchmark results and conclusions will surprise you. ...
The Experimental Study of CODASYL Database Administration at
... of access at the expense of others. The first phase of our study addresses the optimisation of the storage structure of CODASYL database. One intention is to demonstrate the effects of CODASYL database storage record placement strategies on the cost of query and update transactions. The other intent ...
... of access at the expense of others. The first phase of our study addresses the optimisation of the storage structure of CODASYL database. One intention is to demonstrate the effects of CODASYL database storage record placement strategies on the cost of query and update transactions. The other intent ...
Requirements_and_UseCases
... The Relational model and the RDF/OWL model differ in significant ways and the modeling languages enable concepts to be expressed as different structures. The following requirements are based on general modeling and model transformation capabilities. 4.2.1 Table Parsing – I don’t understand what this ...
... The Relational model and the RDF/OWL model differ in significant ways and the modeling languages enable concepts to be expressed as different structures. The following requirements are based on general modeling and model transformation capabilities. 4.2.1 Table Parsing – I don’t understand what this ...
Lecture 21
... Abridged Declaration of Independence A Declaration By the Representatives of the United States of America, in General Congress Assembled. When in the course of human events it becomes necessary for a people to advance from that subordination in which they have hitherto remained, and to assume among ...
... Abridged Declaration of Independence A Declaration By the Representatives of the United States of America, in General Congress Assembled. When in the course of human events it becomes necessary for a people to advance from that subordination in which they have hitherto remained, and to assume among ...
Chapter 1
... entire database for a community of users • Captures data specification (metadata) • Describes all data items and relationships between data together with integrity constraints • Separates data from the program (or views from the ...
... entire database for a community of users • Captures data specification (metadata) • Describes all data items and relationships between data together with integrity constraints • Separates data from the program (or views from the ...
Oracle Transaction Isolation Levels Examples
... The first thing to notice in Table 4 is that this other database, upon reading account 987, will block my query. This session must wait on that row until the transaction holding the exclusive lock commits. This is one reason why many people have a bad habit of committing every statement, instead of ...
... The first thing to notice in Table 4 is that this other database, upon reading account 987, will block my query. This session must wait on that row until the transaction holding the exclusive lock commits. This is one reason why many people have a bad habit of committing every statement, instead of ...
2.4. the database management system
... When we are talking about computers, we instantly think about the speed that allows us to execute complex operations. This speed is mainly used during searches. This means the extraction of a datum from an archive or database. This requires a database, which stores the data. The operation system ‘Wi ...
... When we are talking about computers, we instantly think about the speed that allows us to execute complex operations. This speed is mainly used during searches. This means the extraction of a datum from an archive or database. This requires a database, which stores the data. The operation system ‘Wi ...
Session3_Module5
... Indexes are of two types, clustered and nonclustered. In a clustered index, data is physically sorted. Hence, a table can have only one clustered index. In a nonclustered index, data is not physically sorted, only pointers are created to point to the physical location of the data. Hence, a table can ...
... Indexes are of two types, clustered and nonclustered. In a clustered index, data is physically sorted. Hence, a table can have only one clustered index. In a nonclustered index, data is not physically sorted, only pointers are created to point to the physical location of the data. Hence, a table can ...
CS211 Lecture: Persistence; Introduction to Relational Databases
... load or store a large file, and redoing a log can be a problem in its own right. 3. A third approach is to make use of objects that reside on disk, with some or all of this information replicated in main memory where the program can use it, and that arrange to update the copy on disk whenever the co ...
... load or store a large file, and redoing a log can be a problem in its own right. 3. A third approach is to make use of objects that reside on disk, with some or all of this information replicated in main memory where the program can use it, and that arrange to update the copy on disk whenever the co ...
Data Design - dFPUG
... the rest of the data objects (except for free tables). A table consists of rows of information where each piece of information exists in a field. For example, a table of employee information consists of rows where each row represents data on one person. A person's data might consist of first name, l ...
... the rest of the data objects (except for free tables). A table consists of rows of information where each piece of information exists in a field. For example, a table of employee information consists of rows where each row represents data on one person. A person's data might consist of first name, l ...
View File - University of Engineering and Technology, Taxila
... • If several clients request sizeable result sets simultaneously, this could easily consume all the servers memory resources, causing thrashing and poor performance. • If potentially huge result sets can be returned from an API request, it means it is possible to create applications using the API th ...
... • If several clients request sizeable result sets simultaneously, this could easily consume all the servers memory resources, causing thrashing and poor performance. • If potentially huge result sets can be returned from an API request, it means it is possible to create applications using the API th ...
Compile-Time Path Expansion in Lore 1
... using a Title index was less because typically there are many Keyword subobjects for a movie, but usually only one Title, thus requiring less search when a Title index is not present. If both indexes are present then the optimizer selects a more sophisticated query execution strategy (a combination ...
... using a Title index was less because typically there are many Keyword subobjects for a movie, but usually only one Title, thus requiring less search when a Title index is not present. If both indexes are present then the optimizer selects a more sophisticated query execution strategy (a combination ...
Modular Data Storage with Anvil
... An Anvil table representation will usually consist of several readonly dTables, created at different times, and one writable dTable. Using this representation directly from client code would inconveniently require consultation of all the dTables. In addition, the periodic conversion of write-optimiz ...
... An Anvil table representation will usually consist of several readonly dTables, created at different times, and one writable dTable. Using this representation directly from client code would inconveniently require consultation of all the dTables. In addition, the periodic conversion of write-optimiz ...
Data Source Architectural Patterns
... You can use static find methods, but they preclude (prevent) polymorphism should you want to substitute different finder methods for different data sources In this case it often makes sense to have separate finder objects so that each table in a relational database will have one finder class and one ...
... You can use static find methods, but they preclude (prevent) polymorphism should you want to substitute different finder methods for different data sources In this case it often makes sense to have separate finder objects so that each table in a relational database will have one finder class and one ...
Document
... Sequential files contains records that are stored and processed in sequential order Random access files are organized so you can access a record by specifying its record number Database is one or more files that help make queries Relational database organized in tables and rows ...
... Sequential files contains records that are stored and processed in sequential order Random access files are organized so you can access a record by specifying its record number Database is one or more files that help make queries Relational database organized in tables and rows ...
No Slide Title
... Data relating to the relationship is stored in the relational table. Recording the semester of enrolment, marks, and the grade for each student along with the relationship places logically related data in one location. ...
... Data relating to the relationship is stored in the relational table. Recording the semester of enrolment, marks, and the grade for each student along with the relationship places logically related data in one location. ...