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The Design of a Robust Persistence Layer For Relational
... encapsulates the behavior needed to store objects in persistence mechanisms such as object databases, files, and relational databases. By conforming to this class-type architecture the robustness of your source code increases dramatically due to reduced coupling within your application. Figure 4 sho ...
... encapsulates the behavior needed to store objects in persistence mechanisms such as object databases, files, and relational databases. By conforming to this class-type architecture the robustness of your source code increases dramatically due to reduced coupling within your application. Figure 4 sho ...
10. Creating and Maintaining Geographic Databases Learning
... structured and indexed to provide efficient query and transaction ...
... structured and indexed to provide efficient query and transaction ...
PHP Database Support
... PHP Database Support (cont'd) • The other way is to access the required database using the PEAR DB library which comes with PHP. – PEAR DB is a database-independent library which hides database specifics allowing the same PHP script to access many DBMSs. – One disadvantage of the PEAR DB approach i ...
... PHP Database Support (cont'd) • The other way is to access the required database using the PEAR DB library which comes with PHP. – PEAR DB is a database-independent library which hides database specifics allowing the same PHP script to access many DBMSs. – One disadvantage of the PEAR DB approach i ...
Chapter 3
... B. Two database users might want to access the same record at the same time C. A credit entry for a customer requires a debit entry for a ...
... B. Two database users might want to access the same record at the same time C. A credit entry for a customer requires a debit entry for a ...
DAT304
... Enable virtual directory settings Create query in template format
Create the physical template directory
Configure the virtual template mapping
Save into XML file in template directory
Just point to the template with a URL
...
... Enable virtual directory settings Create query in template format
Analyzing Data Using Access
... Macro and Modules are user programs written to automate functions or create a complete database application. Access databases are relational databases, which means they contain several tables that are linked together by special matching fields called primary keys. In this way, complex data structure ...
... Macro and Modules are user programs written to automate functions or create a complete database application. Access databases are relational databases, which means they contain several tables that are linked together by special matching fields called primary keys. In this way, complex data structure ...
Chapter 8
... © Worboys and Duckham (2004) GIS: A Computing Perspective, Second Edition, CRC Press ...
... © Worboys and Duckham (2004) GIS: A Computing Perspective, Second Edition, CRC Press ...
Query-by-Example (QBE)
... Attributes of relations are listed vertically, one below the other, instead of horizontally Instead of using variables, lines (links) between attributes are used to specify that their values should be the same. Links are added automatically on the basis of attribute name, ...
... Attributes of relations are listed vertically, one below the other, instead of horizontally Instead of using variables, lines (links) between attributes are used to specify that their values should be the same. Links are added automatically on the basis of attribute name, ...
MySQL
... Introduction to MySQL for student projects MySQL is a widely used open source relational database management system, developed on the client/server model. The MySQL client is an interactive command-line program that allows you to connect to a MySQL server, run queries and view results (it can also b ...
... Introduction to MySQL for student projects MySQL is a widely used open source relational database management system, developed on the client/server model. The MySQL client is an interactive command-line program that allows you to connect to a MySQL server, run queries and view results (it can also b ...
QAQQINI Options - Gateway/400 Group
... Asynchronous jobs may be used for database queries that involve distributed tables. Asynchronous jobs may be used for any database query. No asynchronous jobs are allowed to be used for database query processing. In addition, all processing for queries involving distributed tables occurs synchronous ...
... Asynchronous jobs may be used for database queries that involve distributed tables. Asynchronous jobs may be used for any database query. No asynchronous jobs are allowed to be used for database query processing. In addition, all processing for queries involving distributed tables occurs synchronous ...
Effective Management of Location Dependent Continuous Queries in Mobile Environment
... (ULDB) that stores a user’s current location information. The other is the Location Dependent Database (LDDB) that stores Location Dependent Data (LDD) for specific base-stations (zone). LDDB is a static database which can only be queried, but which rarely needs to be updated since the database cont ...
... (ULDB) that stores a user’s current location information. The other is the Location Dependent Database (LDDB) that stores Location Dependent Data (LDD) for specific base-stations (zone). LDDB is a static database which can only be queried, but which rarely needs to be updated since the database cont ...
JDBC - Free
... DriverManager.getConnection( "jdbc:oracle:thin:@localhost:1521:ODP", "user", ""); ...
... DriverManager.getConnection( "jdbc:oracle:thin:@localhost:1521:ODP", "user", ""); ...
JDBC draivera versijas noteikšana
... First it needs to establish a connection with the data source you want to use. A data source can be a DBMS, a legacy file system, or some other source of data with a corresponding JDBC driver. Typically, a JDBC application connects to a target data source using one of two classes: 1. DriverManager: ...
... First it needs to establish a connection with the data source you want to use. A data source can be a DBMS, a legacy file system, or some other source of data with a corresponding JDBC driver. Typically, a JDBC application connects to a target data source using one of two classes: 1. DriverManager: ...
Chapter 21:Application Development and Administration
... Security mechanisms needed to ensure that malicious scripts ...
... Security mechanisms needed to ensure that malicious scripts ...
Enabling Intensional Access Control via Preference
... PostgreSQL is a widely-used, open-source, object-relational database management system [3]. In all, it consists of over 700,000 lines of code. To support our extensions to SQL, we have modified the optimizer contained within PostgreSQL. As PostgreSQL is not a distributed database management system, ...
... PostgreSQL is a widely-used, open-source, object-relational database management system [3]. In all, it consists of over 700,000 lines of code. To support our extensions to SQL, we have modified the optimizer contained within PostgreSQL. As PostgreSQL is not a distributed database management system, ...
Release Notes - CONNX Solutions
... CONNX 8.8 expands the database support of CONNX to include VSAM files on the VSE platform. A new component called the CONNX Data Synchronization Tool has been added to the CONNX family of products. This component provides a fast and easy method of creating data marts and data warehouses. Direct supp ...
... CONNX 8.8 expands the database support of CONNX to include VSAM files on the VSE platform. A new component called the CONNX Data Synchronization Tool has been added to the CONNX family of products. This component provides a fast and easy method of creating data marts and data warehouses. Direct supp ...
Run Magic apps with Oracle, MS SQL, MySQL and PostgreSQL
... this without any need to modify your source code. Magicians usually issue a DBDEL command to delete a file. The Magic runtime processes DBDEL by issuing a file delete command through the Windows operating system and not through the Btrieve API. This means that the Mertech drivers are not able to tra ...
... this without any need to modify your source code. Magicians usually issue a DBDEL command to delete a file. The Magic runtime processes DBDEL by issuing a file delete command through the Windows operating system and not through the Btrieve API. This means that the Mertech drivers are not able to tra ...
Keyword Searching and Browsing in Databases using BANKS
... Database and Query Model Informal Model(cond.) An answer to a query should be a subgraph connecting nodes matching the keywords. The importance of a link depends upon the type of the link i.e. what relations it connects and on its semantics Ignoring directionality would cause problems becau ...
... Database and Query Model Informal Model(cond.) An answer to a query should be a subgraph connecting nodes matching the keywords. The importance of a link depends upon the type of the link i.e. what relations it connects and on its semantics Ignoring directionality would cause problems becau ...
Chapter 7: Relational Database Design
... Implementation of Atomicity and Durability The recovery-management component of a database system ...
... Implementation of Atomicity and Durability The recovery-management component of a database system ...
managing the access to the scientific grey literature
... computer connected to the Internet, so the idea is to facilitate and make efficient the online exchange of researcher’ scientific results with colleagues of the same Institute (even anonymously on the intranet) In the intranet of the Institute is easy to share databases of information without the co ...
... computer connected to the Internet, so the idea is to facilitate and make efficient the online exchange of researcher’ scientific results with colleagues of the same Institute (even anonymously on the intranet) In the intranet of the Institute is easy to share databases of information without the co ...
Conceptual modelling methods for biological data
... how can one anticipate attributes and entity types if researchers do not precisely know the parameters? These ‘informed guesstimates’ may not only be valid in hindsight, but be of such importance, that what at present suffice as an attribute, may become of such importance, with its own related param ...
... how can one anticipate attributes and entity types if researchers do not precisely know the parameters? These ‘informed guesstimates’ may not only be valid in hindsight, but be of such importance, that what at present suffice as an attribute, may become of such importance, with its own related param ...
Relational Databases - CSE Buffalo
... each operator takes one or two relations as arguments and returns a relation as the result operators can be nested to form expressions procedural query language: expressions describe how the query can be ...
... each operator takes one or two relations as arguments and returns a relation as the result operators can be nested to form expressions procedural query language: expressions describe how the query can be ...
Joins and subqueries
... A subquery can be defined as a SELECT query that returns a single value Subqueries are nested within a SELECT, INSERT, UPDATE, or DELETE statement Subqueries can be used to retrieve data from multiple tables and can be used as an alternative to a join Subqueries can also be used inside the WHERE ...
... A subquery can be defined as a SELECT query that returns a single value Subqueries are nested within a SELECT, INSERT, UPDATE, or DELETE statement Subqueries can be used to retrieve data from multiple tables and can be used as an alternative to a join Subqueries can also be used inside the WHERE ...
Query Example
... Attributes of relations are listed vertically, one below the other, instead of horizontally Instead of using variables, lines (links) between attributes are used to specify that their values should be the same. Links are added automatically on the basis of attribute name, ...
... Attributes of relations are listed vertically, one below the other, instead of horizontally Instead of using variables, lines (links) between attributes are used to specify that their values should be the same. Links are added automatically on the basis of attribute name, ...
Versant Object Database
![](https://commons.wikimedia.org/wiki/Special:FilePath/Versant_logo_2007.png?width=300)
Versant Object Database (VOD) is an object database software product developed by Versant Corporation.The Versant Object Database enables developers using object oriented languages to transactionally store their information by allowing the respective language to act as the Data Definition Language (DDL) for the database. In other words, the memory model is the database schema model.In general, persistence in VOD in implemented by declaring a list of classes, then providing a transaction demarcation application programming interface to use cases. Respective language integrations adhere to the constructs of that language, including syntactic and directive sugars.Additional APIs exist, beyond simple transaction demarcation, providing for the more advanced capabilities necessary to address practical issues found when dealing with performance optimization and scalability for systems with large amounts of data, many concurrent users, network latency, disk bottlenecks, etc.