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- Step 1 of 16a.Data:• Data is basically the collection of raw or recorded facts,figures, or numbers.• It is unorganized and has no meaning.• Data by itself is useless and cannot be put to use in itsnative form.• Data exists in a variety of form such as number, value,variable, and so on.• For example: Employee number, employee name, job, salary.
- Step 2 of 16b.Information:• Information is data which is organized and has meaning.• It is the collection of processed data and figures.• It can be used to derive relevance from the existing data andcan be put to use.
- Step 3 of 16c.Metadata• Description about data or data about data is calledmetadata.• It provides the description about the characteristics orproperties of end user data and environment of the data.• The main use of metadata is to help discover the informationwhich is required quickly and effortlessly.
- Step 4 of 16d.Database application• A database application serves as a medium between the user andthe DBMS.• It is a set of related programs that provide information tothe user.• It is an application program which performs updating,entering, and retrieving information from the database on behalf ofthe database users.• The application program is used to interact with the user. Theuser enters the information in the form and the information isprocessed by the application program.
- Step 5 of 16e.Data warehouse• Data warehouse refers to a database which is used forreporting and data analysis.• Data warehouse is defined as central repository of the datathat is created with the help of integrating the data from manysources.• A combination of two or more databases from an enterprisedatabase system is called a Data warehouse.• Current as well as historical data can be stored into a datawarehouse and this data can be used for creating reports.
- Step 6 of 16f.ConstraintAug 17, 2017 - Welcome back everyone to another video, in this one we'll be attempting to boot fuchsia os, or at least a part of it on an actual x86 PC based. Fuchsia os iso download for pc windows 7.• Constraint is the condition which has to be followed andcannot be violated by the users.• Database management system insists the database designer toimplement the integrity constraint.• An entity integrity constraint specifies that every table musthave a primary key and the primary key should contain unique valuesand cannot contain null values.
- Step 7 of 16g.Database• Database is collection of related data, stored in an organizedmanner in the tables according to the user specified forms.• It is a collection of needed information, data, and facts,figures and is managed by a special type of software known as theDBMS.• In database, one can perform the operation such as storing,manipulating, and retrieving the data.
- Step 8 of 16h.Entity• An entity is a person, place, event, idea or any real objectfor which user wants to store in the database.• Entity is the basic block for building the data collectedabout person, place, event, or thing.Toshiba a505 ricoh pcie memory stick host controller driver windows 7. • Entities has attributes that describe the entity.• Employee, orders, sales, students, and products are theexamples of entities.
- Step 9 of 16i.Database management system• DBMS is a collection of programs that enables users tocreate, maintain, and manipulate a database.• The DBMS is a general purpose software system thatfacilitates the process of defining, constructing, and manipulatingdatabase.
- Step 10 of 16j.Client/server architecture:• Client/server architecture is a distributed application thatseparates the workload between the client and server.• Database in the server performs the operation needed by theclient and sends it to the client.• User interface function of the client is managed by theapplication program.• Server shares the resources with the client.• Client doesn’t share the resources but requests the resourcesfrom the server.
- Step 11 of 16k.Systems development life cycle (SDLC):• SDLC provides the groundwork to develop an information systemproject.• It refers to the end-to-end process of designing, building,and delivering an Information System (IS) that will meet therequirements of the business processes.
- Step 12 of 16l.Agile software development:• This process involves the simple and iterative applicationdevelopment in which every iteration includes the planning,requirement analysis, testing, coding, design, anddocumentation.• It is an approach for the development of database andsoftware.• It focuses on the individuals and interaction, working of thesoftware, customer relationship, and response to the feedback.
- Step 13 of 16m.Enterprise data model• It is the initial stage in the software development andspecifies the scope and general content of the organizationaldatabase.• It creates the graphical model of the database used by theorganization.
- Step 14 of 16n.Conceptual data model (or schema)• It is a specification which is detailed and does not depend ontechnology to give the general structure of database.• Conceptual schema is the output of the conceptual modelingphase.• The conceptual schema hides the details of physical storagestructures and concentrates on describing entities, data types,relationships, user operations and constraints.
- Step 15 of 16o.Logical data model (or schema)• Logical data model represents the domain information in aconceptual form.• It represents the data for a data management technology suchas relational model.• Elements of the relational model are tables, rows, columns,primary key, foreign key, and constraints.
- Step 16 of 16p.Physical data model (or schema)• Physical data models are used to described data at the lowestlevel.• It provides the information that how the particular managementsystem stores the data from the logical schema into computer’ssecondary memory.• Each logical schema contains one physical schema.
Modern Database Management 12th Edition Pdf Free Download
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Modern Database Management Pdf
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