Topic: The Database Environment
... Concurrent access to data. Multiple users can access and edit the same data at the same time courtesy of the DBMS's built in transaction management and concurrency control mechanisms. This management is completely transparent to the end user; if one person’s in the middle of editing a contact anothe ...
... Concurrent access to data. Multiple users can access and edit the same data at the same time courtesy of the DBMS's built in transaction management and concurrency control mechanisms. This management is completely transparent to the end user; if one person’s in the middle of editing a contact anothe ...
Client/Server and Middleware
... Improved security if the stored procedure is accessed rather than the data and code being moved to the server Improved data integrity as multiple applications access the same stored procedure Thinner clients (and a fatter database server) ...
... Improved security if the stored procedure is accessed rather than the data and code being moved to the server Improved data integrity as multiple applications access the same stored procedure Thinner clients (and a fatter database server) ...
Ch2
... – Provide concepts that are close to the way many users perceive data. • (Also called entity-based or object-based data models.) ...
... – Provide concepts that are close to the way many users perceive data. • (Also called entity-based or object-based data models.) ...
mod-5
... for each pair of functional dependencies f1and f2 in F + if f1 and f2 can be combined using transitivity then add the resulting functional dependency to F + until F + does not change any further NOTE: We shall see an alternative procedure for this task later ...
... for each pair of functional dependencies f1and f2 in F + if f1 and f2 can be combined using transitivity then add the resulting functional dependency to F + until F + does not change any further NOTE: We shall see an alternative procedure for this task later ...
Reporting and Data Access Methods
... OLE DB Reporting Provider The Act! OLE DB Reporting Provider is a data source provider included with Act! Pro and Act! Premium (includes access via Windows® and web). The Provider is designed to leverage the underlying client-server platform and the power of the Microsoft® SQL Server® relational da ...
... OLE DB Reporting Provider The Act! OLE DB Reporting Provider is a data source provider included with Act! Pro and Act! Premium (includes access via Windows® and web). The Provider is designed to leverage the underlying client-server platform and the power of the Microsoft® SQL Server® relational da ...
foundations of business intelligence: databases and information
... A relational database organizes data in the form of two-dimensional tables. Illustrated here are tables for the entities SUPPLIER and PART showing how they represent each entity and its attributes. Supplier Number is a primary key for the SUPPLIER table and a foreign key for the PART table. ...
... A relational database organizes data in the form of two-dimensional tables. Illustrated here are tables for the entities SUPPLIER and PART showing how they represent each entity and its attributes. Supplier Number is a primary key for the SUPPLIER table and a foreign key for the PART table. ...
databases and information management
... A relational database organizes data in the form of two-dimensional tables. Illustrated here are tables for the entities SUPPLIER and PART showing how they represent each entity and its attributes. Supplier Number is a primary key for the SUPPLIER table and a foreign key for the PART table. ...
... A relational database organizes data in the form of two-dimensional tables. Illustrated here are tables for the entities SUPPLIER and PART showing how they represent each entity and its attributes. Supplier Number is a primary key for the SUPPLIER table and a foreign key for the PART table. ...
database management system and information retrival
... manipulation with management and retrieval of textual (“unformatted”) data. The relational data model is widely accepted as a high level interface to classical (“formatted”) data management. It turns out, however, to be inconvenient for handling even simple data structures as commonly used in inform ...
... manipulation with management and retrieval of textual (“unformatted”) data. The relational data model is widely accepted as a high level interface to classical (“formatted”) data management. It turns out, however, to be inconvenient for handling even simple data structures as commonly used in inform ...
The realities of polyglot persistence in mainstream enterprises
... 1 Structured query language, or SQL, is the dominant query language associated with relational databases. NoSQL stands for not only structured query language. In practice, the term NoSQL is used loosely to refer to non-relational databases designed for distributed environments, rather than the asso ...
... 1 Structured query language, or SQL, is the dominant query language associated with relational databases. NoSQL stands for not only structured query language. In practice, the term NoSQL is used loosely to refer to non-relational databases designed for distributed environments, rather than the asso ...
Electronic Commerce System Case Study Chapter 22
... Customer Agent (see Figure 22.2) assists the customer who wishes to order one or more items from a catalog. It takes the customer’s request and interacts with the server agents to further the processing of the customer’s selection and to track the status. The customer may select several items from a ...
... Customer Agent (see Figure 22.2) assists the customer who wishes to order one or more items from a catalog. It takes the customer’s request and interacts with the server agents to further the processing of the customer’s selection and to track the status. The customer may select several items from a ...
Database Reorganization
... budgets. The attribute PHONE NUMBER is associated with a project and is represented as a field in the parent record type. In the relational model it would be an attribute in a project relation. b) In the second diagram the projects are well funded, and each employee may have his or her own phone num ...
... budgets. The attribute PHONE NUMBER is associated with a project and is represented as a field in the parent record type. In the relational model it would be an attribute in a project relation. b) In the second diagram the projects are well funded, and each employee may have his or her own phone num ...
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Introduction to PL/SQL Lecture 1 [Part 1]
... Rowid – used to store the special format of rowid’s on the database ...
... Rowid – used to store the special format of rowid’s on the database ...
The Case For Change Notifications in Pull-Based
... querying capabilities (e.g. InfluxDB3 ), they are typically employed for analytic queries, materialized view maintenance or downsampling streams of information and do not extend to change notifications. In recent years, new database systems have emerged that aim to provide real-time change notificat ...
... querying capabilities (e.g. InfluxDB3 ), they are typically employed for analytic queries, materialized view maintenance or downsampling streams of information and do not extend to change notifications. In recent years, new database systems have emerged that aim to provide real-time change notificat ...
Database Management Systems - Health Information Technology
... A1. Discuss database management systems and database administration. B1. Analyze, design, and create relational databases to meet industry and customer needs using current relational database management system software. C1. Identify the business rules and customer requirements to be included in the ...
... A1. Discuss database management systems and database administration. B1. Analyze, design, and create relational databases to meet industry and customer needs using current relational database management system software. C1. Identify the business rules and customer requirements to be included in the ...
Chapter 1 Database Application
... 1. Data structure Data are organised in the form of rows and columns, i.e. tables, each representing an entity class. 2. Data manipulation SQL commands are used to manipulate data stored in the tables. 3. Data integrity Constraints are included to ensure that there is no loss of data integrity. ...
... 1. Data structure Data are organised in the form of rows and columns, i.e. tables, each representing an entity class. 2. Data manipulation SQL commands are used to manipulate data stored in the tables. 3. Data integrity Constraints are included to ensure that there is no loss of data integrity. ...
Introduction to XML
... Same functionality as database query languages (such as SQL) to process Web data Advantages Query selective portions of the document (no need to transport entire document) Smaller data size mean lesser communication cost ...
... Same functionality as database query languages (such as SQL) to process Web data Advantages Query selective portions of the document (no need to transport entire document) Smaller data size mean lesser communication cost ...
New SQL Performance Optimizations to Enhance Your SAS® Client and Solution Access to the Database
... SAS® SQL has been used for years as the way many SAS® products query for their data. Take a look at the new SQL performance optimizations that have been added to this bellwether procedure, optimizations designed to greatly expand query pass-thru capability to data bases and shorten your SAS client a ...
... SAS® SQL has been used for years as the way many SAS® products query for their data. Take a look at the new SQL performance optimizations that have been added to this bellwether procedure, optimizations designed to greatly expand query pass-thru capability to data bases and shorten your SAS client a ...
Geographical Database
... (gegraphic/georeferenced data). The database should be viewed as a representation or model of the world developed for a very specific application Spatial DB vs. Image/pictorial DB (90s) ...
... (gegraphic/georeferenced data). The database should be viewed as a representation or model of the world developed for a very specific application Spatial DB vs. Image/pictorial DB (90s) ...
development of the web-based nist x
... presented to the Web browser, and sends them to the browser for display (first tier). For the server side of this system, we chose Windows NT 4.0 as the operating system and Internet Information Server (IIS) 4.0 as the Web server (see References and Notes section). Scientific data are stored in a re ...
... presented to the Web browser, and sends them to the browser for display (first tier). For the server side of this system, we chose Windows NT 4.0 as the operating system and Internet Information Server (IIS) 4.0 as the Web server (see References and Notes section). Scientific data are stored in a re ...
Queries management: Interfacing SAS with in-house EDC application
... With the use of EDC technology, such checks can be applied on-line during the data collection. EDC technology also allows the efficient management of the queries process: the queries are sent and answered directly in the application, and data can be corrected on-line while the EDC system tracks all ...
... With the use of EDC technology, such checks can be applied on-line during the data collection. EDC technology also allows the efficient management of the queries process: the queries are sent and answered directly in the application, and data can be corrected on-line while the EDC system tracks all ...
Getting Started with Oracle Server
... - Checks the data dictionary to ensure all of the objects and columns actually exist - Locks on objects are obtained so the definition does not change - Checks the users privileges - Determines the execution plan - Loads the SQL and the plan into the shared SQL area ...
... - Checks the data dictionary to ensure all of the objects and columns actually exist - Locks on objects are obtained so the definition does not change - Checks the users privileges - Determines the execution plan - Loads the SQL and the plan into the shared SQL area ...
Relational model
The relational model for database management is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in 1969 by Edgar F. Codd. In the relational model of a database, all data is represented in terms of tuples, grouped into relations. A database organized in terms of the relational model is a relational database.The purpose of the relational model is to provide a declarative method for specifying data and queries: users directly state what information the database contains and what information they want from it, and let the database management system software take care of describing data structures for storing the data and retrieval procedures for answering queries.Most relational databases use the SQL data definition and query language; these systems implement what can be regarded as an engineering approximation to the relational model. A table in an SQL database schema corresponds to a predicate variable; the contents of a table to a relation; key constraints, other constraints, and SQL queries correspond to predicates. However, SQL databases deviate from the relational model in many details, and Codd fiercely argued against deviations that compromise the original principles.