What is domain in ERD in DBMS?
Domain is the range of values that an attribute can possess.
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DataBase Management System (DBMS) is a software package that allows data to be effectively stored, retrieved and manipulated and the data stored in a DBMS packege can be accessed by multiple users and by multiple application programs like (SQL Server, Oracle, Ms-Access) . The advantages of DBM…S . It represents complex relationships among different data items. . Keeps a tight control on data redundancy. . Enforces user defined rules to ensure the integrity of data in a table form. . Maintains data dictionary for the storage of information pertaining to data fields and data manipulation. . Ensures that data can be shared across all applications. . Enforces data access authorization. . Has an automatic intelligent backup and recovery procedure of data. . Has different interfaces through which users can manipulate data. Advantages of using a DBMS . There are three main features of a database management system that make it attractive to use a DBMS in preference to more conventional software. These features are centralized data management , data independence , and systems integration . In a database system, the data is managed by the DBMS and all access to the data is through the DBMS providing a key to effective data processing. This contrasts with conventional data processing systems where each application program has direct access to the data it reads or manipulates. In a conventional DP system, an organization is likely to have several files of related data that are processed by several different application programs. In the conventional data processing application programs, the programs usually are based on a considerable knowledge of data structure and format. In such environment any change of data structure or format would require appropriate changes to the application programs. These changes could be as small as the following: . Coding of some field is changed. For example, a null value that was coded as -1 is now coded as -9999. . A new field is added to the records. . The length of one of the fields is changed. For example, the maximum number of digits in a telephone number field or a postcode field needs to be changed. . The field on which the file is sorted is changed. If some major changes were to be made to the data, the application programs may need to be rewritten. In a database system, the database management system provides the interface between the application programs and the data. When changes are made to the data representation, the metadata maintained by the DBMS is changed but the DBMS continues to provide data to application programs in the previously used way. The DBMS handles the task of transformation of data wherever necessary. This independence between the programs and the data is called data independence . Data independence is important because every time some change needs to be made to the data structure, the programs that were being used before the change would continue to work. To provide a high degree of data independence, a DBMS must include a sophisticated metadata management system. In DBMS, all files are integrated into one system thus reducing redundancies and making data management more efficient. In addition, DBMS provides centralized control of the operational data. Some of the advantages of data independence, integration and centralized control are: . Redundancies and inconsistencies can be reduced In conventional data systems, an organisation often builds a collection of application programs often created by different programmers and requiring different components of the operational data of the organisation. The data in conventional data systems is often not centralised. Some applications may require data to be combined from several systems. These several systems could well have data that is redundant as well as inconsistent (that is, different copies of the same data may have different values). Data inconsistencies are often encoutered in everyday life. For example, we have all come across situations when a new address is communicated to an organisation that we deal with (e.g. a bank, or Telecom, or a gas company), we find that some of the communications from that organisation are recived at the new address while others continue to be mailed to the old address. Combining all the data in a database would involve reduction in redundancy as well as inconsistency. It also is likely to reduce the costs for collection, storage and updating of data. . Better service to the Users A DBMS is often used to provide better service to the users. In conventional systems, availability of information is often poor since it normally is difficult to obtain information that the existing systems were not designed for. Once several conventional systems are combined to form one centralised data base, the availability of information and its up-to-dateness is likely to improve since the data can now be shared and the DBMS makes it easy to respond to unforseen information requests. Centralizing the data in a database also often means that users can obtain new and combined information that would have been impossible to obtain otherwise. Also, use of a DBMS should allow users that do not know programming to interact with the data more easily. The ability to quickly obtain new and combined information is becoming increasingly important in an environment where various levels of governments are requiring organisations to provide more and more information about their activities. An organisation running a conventional data processing system would require new programs to be written (or the information compiled manually) to meet every new demand. . Flexibility of the system is improved Changes are often necessary to the contents of data stored in any system. These changes are more easily made in a database than in a conventional system in that these changes do not need to have any impact on application programs. . Cost of developing and maintaining systems is lower As noted earlier, it is much easier to respond to unforseen requests when the data is centralized in a database than when it is stored in conventional file systems. Although the initial cost of setting up of a database can be large, one normally expects the overall cost of setting up a database and developing and maintaining application programs to be lower than for similar service using conventional systems since the productivity of programmers can be substantially higher in using non-procedural languages that have been developed with modern DBMS than using procedural languages. . Standards can be enforced Since all access to the database must be through the DBMS, standards are easier to enforce. Standards may relate to the naming of the data, the format of the data, the structure of the data etc. . Security can be improved In conventional systems, applications are developed in an ad hoc manner. Often different system of an organisation would access different components of the operational data. In such an environment, enforcing security can be quite difficult. Setting up of a database makes it easier to enforce security restrictions since the data is now centralized. It is easier to control who has access to what parts of the database. However, setting up a database can also make it easier for a determined person to breach security. We will discuss this in the next section. . Integrity can be improved Since the data of the organization using a database approach is centralized and would be used by a number of users at a time, it is essential to enforce integrity controls. Integrity may be compromised in many ways. For example, someone may make a mistake in data input and the salary of a full-time employee may be input as $4,000 rather than $40,000. A student may be shown to have borrowed books but has no enrolment. Salary of a staff member in one department may be coming out of the budget of another department. If a number of users are allowed to update the same data item at the same time, there is a possiblity that the result of the updates is not quite what was intended. For example, in an airline DBMS we could have a situation where the number of bookings made is larger than the capacity of the aircraft that is to be used for the flight. Controls therefore must be introduced to prevent such errors to occur because of concurrent updating activities. However, since all data is stored only once, it is often easier to maintain integrity than in conventional systems. . Enterprise requirements can be identified All enterprises have sections and departments and each of these units often consider the work of their unit as the most important and therefore consider their needs as the most important. Once a database has been set up with centralised control, it will be necessary to identify enterprise requirements and to balance the needs of competing units. It may become necessary to ignore some requests for information if they conflict with higher priority needs of the enterprise. . Data model must be developed Perhaps the most imporrant advantage of setting up a database system is the requirement that an overall data model for the enterprise be built. In conventional systems, it is more likely that files will be designed as needs of particular applications demand. The overall view is often not considered. Building an overall view of the enterprise data, although often an expensive exercise, is usually very cost-effective in the long term. (MORE)
dBm is decibel power unit referenced to 1 milliwatt. Look at the related links for conversion: voltage to dBm, dBu, and dBV.
DataBase Management System (DBMS) is a software package that allows data to be effectively stored, retrieved and manipulated and the data stored in a DBMS packege can be accessed by multiple users and by multiple application programs like (SQL Server, Oracle, Ms-Access) ..
ERD stands for Entity Relationship Diagram, which is a diagram to describe the database schema in the abstract level.
A domain in an environment where a client - server architecture exists. Its a administrative boundary.
it is the power ratio in decibels No, it isn't. dB on its own is a ratio. But when dB has a suffix, the figure is an absolute measurement, not a ratio. For instance, dBm is a measurement of power compared to 1mW. 0dBm means zero difference between 1mW and the measured figure. In other word…s the measured figure is also 1mW. 3dBm is 3dB greater than 1mW. -3dB is 3dB less than 1mW. etc. Another suffix is W. 0dBW being 1 watt. There are many more suffixes, some of which are used in only a few specialised cases. (MORE)
dbms- database management systems............. it is a collection of interrelated data and the set of programs to access those datas........ it is used to meet the disadvantages of the file systems........ there are many disadvantages of filesystems........ lik,, data redundancy and data in cons…istency, difficulty to access data,integrity problems, atomicity problems.............. dbms is quite complicated but better than file systems (MORE)
\nData Definition Facilities - CREATE and DROP. \nData Manipulation Facilities - SELECT, INSERT, UPDATE and DELETE.\nHelp Facilities - MS Access provides helpful wizards to allow 'novice' users to do a task or even 'expert' users to do it easier.\nReporting Facilities - Creating professional looking… reports from SELECT statements, another good example of this is MS Access.\nData Control Facilities - Permissions, GRANT. Views, CREATE VIEW, etc.\nMulti-user Functionality - Allowing more than one user to access the database simultaneously. Including concurrency controls such as locking part of the database that is being updated.\nDistributed Databases - Distribute the database over several sites.\nCASE Tools - Computer-aided Software Engineering is the automation of the development of software systems. An example of this are the easy tools provided in MS Access and Oracle to create forms for a database.\n. \nI'm sure people can add more, but these are what I see as the main functions. (MORE)
You simply have to go to a website that sells them to you!!!! A good domain selling website would be GoDaddy due to its large range of domain name endings (e.g. .com, .us, .mobi, .co, .net, .org, etc) and cheap prices. You simplay need to search for the domain name you want and see if it is availabl…e. If not, try altering the name slightly until you find the available domain that you want. Also, you canbuy in bulk and save money. So, say you wanted to buy the domain name savemoney.com, then you could buy others such as savemoney.co, savemoney.net, etc at a reduced price. The link you will need to take you to the GoDaddy website is below Happy domain shopping!!! http://x.co/iL2M (MORE)
A web domain is a means of identifying or addressing a particular device on a network. More importantly, a domain name can be used as a means of identifying a brand or ownership of a particular website or resource on the internet. No-one ever really 'owns' a domain, but registering one gives… you the exclusive right to its use for the period you have registered it for. If you need to buy or sell bulk number domain means you can just try to given i suggest that link will help you more.... . (MORE)
NA_. what are highlights of advanced DBMS. what are highlights of advanced DBMS. what are highlights of advanced DBMS
each column contains same type of data thus when you select a data type for a particular domain then DBMS will not accept any value of other data type. Further information contributed by Ramona Maxwell. Please visit www.sqlsolver.com: Domain constraints are a user-defined data type which enforc…es the integrity of the standard data types. A domain consists of all values permitted in a column. In constructing your database you would first select a standard data type such as VARCHAR or INT. You could then constrain or limit the data using NOT NULL, UNIQUE, CHECK, PRIMARY KEY or FOREIGN KEY. For example the CHECK constraint could limit INT data within your domain [column] to numbers less than 5000. You would thus define a custom data type using domain constraints. (MORE)
DataBase Management System (DBMS) is a software package \n . it allows data to be effectively stored, retrieved and manipulated and\n . the data stored in a DBMS packege can be accessed by multiple users and by multiple application programs like (SQL Server, Oracle, Ms-Access) . \n … Types of DBMS \n . Hierarachical DBMS (HDBMS) \n . Network DBMS (NDBMS) \n . Relational DBMS (RDBMS) \n . Object Oriented DataBase(OODB) \n . Distributed DBMS (DDBMS) (MORE)
Database management system is full form of DBMS . Characteristics of a DBMS are following : 1) It maintains data integrity. 2) It reduces redundancy. 3) make access to data easy.
Here is Example!!. Entity: PERSON. Att:Baby_Name, Father_Name. Entity: CITY. Att: Country_Name, City_Name, Hospital_Name. 1 To 1 Relation: . One Baby born at one place(Hospital).
Repository consists of database tables that store metadata which by default consists of 247 objects(183 tables and 64 views). It saves the mapping information and notations.
Aggregation is an important concept in database design where composite objects can be modelled during the design of database applications. Therefore, preserving the aggregation concept in database implementation is essential. In this paper, we propose models for implementation of aggregation in an … Object-Relational Database Management System (ORDBMS) through the use of index clusters and nested tables . ORDBMS is a commercial Relational Database Management Systems (RDBMS), like Oracle, which support some object-oriented concepts. We will also show how queries can be performed on index clusters and nested tables. (MORE)
1.4 ADVANTAGES OF USING DBMS 1.Controlling Redundancy In traditional file processing, every user group maintains its own files. Each group independently keeps files on their db e.g., students. Therefore, much of the data is stored twice or more. Redundancy leads to several problems : duplicati…on of effort storage space wasted when the same data is stored repeatedly files that represent the same data may become inconsistent (since the updates are applied independently by each users group). We can use controlled redundancy.. 2.Restricting Unauthorized Access A DBMS should provide a security and authorization subsystem.. Some db users will not be authorized to access all information in the db (e.g., financial data). Some users are allowed only to retrieve data. Some users are allowed both to retrieve and to update database. 3.Providing Persistent Storage for Program Objects and Data Structures Data structure provided by DBMS must be compatible with the programming language's data structures. E.g., Object oriented DBMS are compatible with programming languages such as C++, SMALLTALK, and the DBMS software automatically performs conversions between programming data structure and file formats. 4.Permitting Inferencing and Actions Using Deduction Rules Deductive database systems provide capabilities for defining deduction rules for inferencing new information from the stored database facts. 5.Providing Multiple User Interfaces (e.g., query languages, programming languages interfaces, forms, menu-driven interfaces, etc.) 6.Representing Complex Relationships Among Data 7.Enforcing Integrity Constraints 8.Providing Backup and Recovery (must provide facilities for recovering from hardware or software failures).. (MORE)
-data redundancy:which reduce the redundancy-repetition of data -security-it provides security for various levels -data sharing-it allows multiple users to access and share the data becomes easier in dbms -data concurrency:it allow multiple users to acess the same data simultaniously
In database technology, domain refers to the description of an attribute's allowed values. The physical description is a set of values the attribute can have, and the semantic , or logical , description is the meaning of the attribute.
Entity Relationship Diagrams (ERD's) are a way of diagrammatically showing entities in an organisations and how they relate to each other. ERD's show detailed representations of the information that is used in a system and how it relates to other data. There are a number of symbols that represent th…e entities and the relationships between them; the relationship can be a one to many relationship, many to many or one to one. (MORE)
Domaineering is the online marketing business practice of acquiring and monetizing Internet domain names for their use primarily as an advertising medium rather than as intellectual property investments for resale as is generally the case in "domaining" which "domaineering" is occasionally confused… with. In essence, the domain names function as virtual Internet billboards with generic domain names being highly valued for their revenue generating potential derived from attracting Internet traffic hits. As with traditional advertising, domaineering is part art and part science. Often to be the most effective as advertising tools, the domain names and their corresponding landing pages must be engineered or optimized to produce maximum revenue which may require considerable skill and good knowledge of search engine optimization ( SEO ) practices, marketing psychology and an understanding of the target market audience. Domaineering generally utilizes a firm offering domain parking services to provide the sponsored "feed" of a word or phrase searched for. Occasionally content is added to develop a functional mini-website. Domaineers and some of those who advertise online using keywords believe domaineering provides a useful, legal and legitimate Internet marketing service while opponents of domaineering decry the practice as increasing the ubiquitous commercialization of the world wide web. Domaineering is practiced by both large companies who may have registered hundreds or even thousands of domains to individual entrepreneurial minded domaineers who may only own one or a few. Done right, domaineering can be very profitable. (MORE)
LOOK UP THE DEFINITTIONS FOR EACH TERM LISTED BELOW AND DRIEFLY EXPLAIN A library. a. input. b. processing. c. output. d. storage. e . end user. f. ERD. g.DFD
A rule that specifies that an instance of a supertype may not simultaneously be a member of two (or more) subtypes
In algebra, a function, is a mapping (or a relationship) betweentwo sets: the domain and the codomain (or range). To each elementof the domain, a function assigns one element of the range.
emergency repair disk: contains information unique to your OS and hard drive, ERD enables restoration on your hard drive of the windows registry, in addition the disk contain information used to build a command window to run DOS-like commands
Choose a dress that loves and flatters your body type. You can choose from various types available in the market from patterns like triangle - for girls with wider hips, reverse triangle - for girls with upper body wider than lower body or hourglass - for girls with larger bust and hips, small waist…. If you exactly know what you are looking for, with exact neckline, color and design, you can always custom made it. However do not forget to get in touch with the best designers. (MORE)
1. ;; '; '; ;' ;' I've told you it's here, haven't I? 2. I'm sure it's Jay's. I'll return it if he's home. 3.I've been told it isn't up to us; it's up to them. 4. ; - - ; -; ;- ;- ;- -; -;- -;- We use a 2-ply tire. 5. We have 1-, 2-, and 3-bedroom condos for purchase. 6. He rated each as a 1-star, 2…-star, or 3-star film. 7. ;; "; "; ";" ";" "I believe," she said, "you won." 8. "John Adams," he said, "was the second president." 9. "James Monroe," I said, "was the fifth president." ----------------------------------------------------------------------------------------------------------------------------------------------------------- 1. old led kit six jay oft zzap cod big laws five ribs 2. pro quo| is just |my firm|was then|may grow|must try 3. Olga sews aqua and red silk to make six big kites. 4. en am an by ham fan buy jam pay may form span corn 5. I am| a man| an elm|by any|buy ham| can plan|try them 6. I am to form a plan to buy a firm in the old town. 7. Jan and I are to see Ms. Han. May Lana come, too? 8. Bob Epps Lives In Rome ; Vic Copa is in Rome, also. 9. Oates and Co. has a branch office in Boise, Idaho. 10. Eight of the girls may go to the social with them. 11. Corla is to work with us to fix the big dock sign. 12. Keith is to pay the six men for the work they did. (MORE)
Database Management System DBMS is used to store information in the form of tables columns and rows, interconnected by keys and accessible throughout an interface. Examples: SQL, MYSQL, ORACLE, etc ...
1. To manage record of information in a desired manner. 2. Provide easy access to user. 3. minimum redundancy. 4. provide easy way to upgrade data.
dbms is data base management system .It is combination of the data base & the the softwares to access the data from the database. eg:Poracle 91,dbase; for more reply to email@example.com
It just serves as a web address. domain is just the name of the Website address
Not really, but now a days, every software that deals with data storage, has some feature of DBMS.
DBMS Benefits 1.Improved strategic use of corporate data 2.Reduced complexity of the organization's information systems environment 3.Reduced data redundancy and inconsistency 4.Enhanced data integrity application-data independence 5.Improved security 6.Reduced application development an…d maintenance cost 7.Improved Flexibility of information systems 8.Increased access and availability of data and information 9.Logical and physical data independence (MORE)
its really good course because the d.b.m.s is the need of today time as in many companies...........many productions managements.
DBMS stands for data base management system. DBMS is a collectionof programs that enables users to create and maintain a database.The DBMS is a general purpose software system used to facilitatethe process of defining, constructing and manipulating data basesfor various applications. features of DBM…S: 1.Data independence 2.Efficient data access 3.Data integrity & security 4.Data administration 5.Reduced application development time (MORE)
DBMS is software that uses computer programs to make, control anduse database in an organization. It helps users to deal withapplications that involve a lot of data handling like creation ofcustomer support system, production control system and managementinformation system.
A DBMS kernal is a type of database. It is usually used in thearchitecture business world and it consists of software andsystem-level data structures.
A dead lock is a state of stalmate that may result two or more transaction are each waitting for lock held by the other to be released. in three condition dead lock is appear.... 1.circular wait 2.no premsive 3. matual execlusive.
a lock is variable associated with a data item that describes the status of the item with respect to possible operation that can be applied to it.
ERD is an Entity Relationship Diagram which is a graphicalrepresentation of database entities (tables, table columns, tabledefinitions, attributes) and inter-relationships between theseentities (how the tables are connected).
It is a constant value that gives the name, structure of table and the constraints laid on it.
Let's start with the GROUP BY clause. You can use this to group values from a column, and, if you wish, perform calculations on that column. Let's look at a simple example: mysql> SELECT poet,SUM(copies_in_stock) FROM writer GROUP BY poet;+----------------------+----------------------+| poet … | SUM(copies_in_stock) |+----------------------+----------------------+| Douglas Livingstone | 23 || Mongane Wally Serote | 13 |+----------------------+----------------------+ by m.sathyam reddy (MORE)
DBMS = DataBase Management System They are used to manage various types of data, which may sound recursive but it's really that the title is fairly descriptive. Data could be anything from a simple grocery list to a list of your Facebook friends (including their email address, mobile number, late…st profile photo and religion), up to a massive set of linked chunks of data such as a warehouse inventory system, tracking data on Vendors, Products, Orders, Customers, Bills of Materials, etc. Current examples of PC DBMS software include Microsoft Access, FileMaker, etc. Lots of people use software such as Excel for managing simple lists, such as a list of products, which might contain their item #, description, price, quantity in stock, etc. (MORE)
Trigger is defined as a procedural code that is automatically executed in response of certain events on a particular table or view. It is used to maintain the database integrity. Example : when a new record is added to the student table, new record should also be created in the tables of the at…tendance, leave & marks table. (MORE)
Entity Relationship Diagrams (ERD's) are one of the main tools used in the software design process.Creating an ERD produces a conceptual data model of the information system. It allows software engineers to understand the system data requirements more comprehensively.
DBMS is database management system and it stores data that are related. DBMS maintains data security and integrity as well.
There are multiple different meanings of the word Erde. Erde is German for Earth but Erde is also a brand of trailer accessories and spare parts in the UK. Erde-Trailers has a homepage that provides information about their trailers but additional listings for Erde Trailers can be found on eBay.
DBMS stands for Database management system in short . As the name suggest it stores and manages the data which is related to each other.
Sara Erde was born on March 18, 1970, in New York City, New York, USA.