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When using a query in a hierarchical database the results often are displayed more quickly than a relational database?
Because the structure of a hierarchical database is set, indexes can be created and utilized for easily that a relational database, where useful indexing is not often an option. Since an index allows direct access to specific data, data retrieval can be much quicker. Additionally, only a few segments are retrieved at a time with hierarchical data, instead of whole resultsets from relational queries.
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What are the typical benefits of relational databases?
With a relational database, you can quickly compare information because of the arrangement of data in columns.A typical relational database has anywhere from 10 to more than 1,000 tables. Each table contains a column or columns that other tables can key on to gather information from that table.By storing this information in another table, the database can create a single small table with the locations that can then be used for a variety of purposes by other tables in the database. A typical large database, like the one a big Web site, such as the police would have, will contain hundreds or thousands of tables like this all used together to quickly find the exact information needed at any given time
What are typical benefit of relational databases?
With a relational database, you can quickly compare information because of the arrangement of data in columns.A typical relational database has anywhere from 10 to more than 1,000 tables. Each table contains a column or columns that other tables can key on to gather information from that table.By storing this information in another table, the database can create a single small table with the locations that can then be used for a variety of purposes by other tables in the database. A typical large database, like the one a big Web site, such as the police would have, will contain hundreds or thousands of tables like this all used together to quickly find the exact information needed at any given time
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Three main types of database applications and briefly explain them with suitable example?
A collection of programs that enables you to store, modify, and extract information from a database. There are many different types of DBMSs, ranging from small systems that run on personal computers to huge systems that run on mainframes. The following are examples of database applications:computerized library systemsautomated teller machinesflight reservation systemscomputerized parts inventory systemsFrom a technical standpoint, DBMSs can differ widely. The terms relational, network, flat, and hierarchical all refer to the way a DBMS organizes information internally. The internal organization can affect how quickly and flexibly you can extract information.
History of rdbms?
1970 - In 1970, Edgar Codd, an IBM computer scientist, wrote a number of papers which developed the idea of a new form of relational database which went beyond the then current hierarchical and network database models. Codd's paper was instrumental in the development of IBM's prototype relational database known as System R (and ultimately in the development of IBM's DB2 database), as well as Oracle, the first commercial relational database1979 - Later in 1979, it was renamed Relational Software Inc and finally it was renamed Oracle. Prior to this Ellison was inspired by the paper written by Edgar F.("Ted") Codd on relational database systems named "A Relational Model of Data for Large Shared Data Banks. Ellison and his partners won a two-year contract to construct a relational database management system (RDBMS) for the CIA with project's code name: ORACLE. Starting with eight employees and with revenue lessJan 5, 1989 - When it can keep track of information in two or more lists simultaneously, it is a relational database. ... A relational database program would allow you to print reports or view on-screen data displays and entry forms combining elements of information from any of those listsOct 3, 1993 - Today, we also have relational databases for the masses, a new genre priced for imminent arrival on your desktop-accompanied by the resounding "thud" that ... The first blow came in November 1992 when Microsoft CorpDec 1995 - Illustra's objective was to revolutionize database management technology through a marriage of object-based and relational database management systems. By December 1995, Illustra was well on the way toward accomplishing that objective. Its technology, developed by Dr. Stonebraker, a professor of the University of California Berkeley, represented the first breakthrough in the 25-year history of the relational database.Dec 1995 - Illustra's objective was to revolutionize database management technology through a marriage of object-based and relational database management systems. By December 1995, Illustra was well on the way toward accomplishing that objective. Its technology, developed by Dr. Stonebraker, a professor of the University of California Berkeley, represented the first breakthrough in the 25-year history of the relational databaseDec 3, 1996 - 56. On December 3, 1996, Informix issued a press release announcing the shipment of its next generation database software product, the Universal Server. The Company's release stated in pertinent part: Informix Software, Inc., (NASDAQ: IFMAX), the leading provider of object-relational database technology, today announced the on-time availability of INFORMIX-Universal Server, the industry's leading open, completely integrated object-relational database management systemNov 29, 1999 - "The component model for XML is complex enough that to store it in a relational database isn't practical," Hoag says. "In the relational-database world, you have to worry about foreign key references, the depth of the model. There is a lot more complexity in mapping an XML componentFeb 1, 2002 - The Accenture system also creates a threat index, using massive computing power and relational database software. ... system designed to instantly pull together every passenger's travel history and living arrangements, plus a wealth of other personal and demographic informationAug 2, 2004 - As a Java-only database, it does not compete directly against mainstream relational database servers, such as DB2, Oracle or Microsoft's SQL Server, ... Cloudscape was developed in the mid-1990s as a relational database created specifically to work with the Java programming language.written by syed fatehyab ahmed
How important is database in business?
we get our work done more quickly and efficiently due to database
What is the use of an index?
(If that's the question being asked...) Indexing in a database system or a simple file-oriented system is used to make different records easier to access quickly. An index would be used to find data based on a certain key value quickly by going directly to the first record with that key, instead of searching the entire database or file. Indices are also handy for linking one file to another, such as with related information in different tables in a relational database system.
What can you use to quickly create a new database?
Form
What are disadvantages of database approach?
The advantages of a relational database are that they contribute to sound logical design, are easy to understand and program, and should be amenable to change as business requirements change. The main earlier systems include file-based systems and Codasyl databases. File-based systems were complex and tended to be inherently restrictive and quickly reached the point where a complete rewrite became necessary if business requirements changed. Codasyl databases were a vast improvement on the old file-based systems, but required a high level of expertise to design properly and, once again, tended to be unable to support changes to business requirements. Because a properly designed relational database reflects business entities and the relationships among those entities, they should be more logical and easier to understand. If the business structure or requirements change in any logical way, the database can be changed in a parallel way, to support those requirements. Relational databases are designed at two levels. First, there is a logical design, normalised at third normal form - where there should not be duplicate data values. Then, there is a physical design, where any necessary denormalisation is carried out.
What can you use in access to quickly create a new database?
Template
How is data retrieved from You Tube?
I believe python is used to quickly reference the database.
What is tuning database?
Database tuning is comprised of a group of activities used to optimize and regulate the performance of a database. It refers to configuration of the database files, the database management system (DBMS), as well as the hardware and operating system on which the database is hosted. The goal of database tuning is to maximize the application of system resources in an attempt to execute transactions as efficiently and quickly as possible.
