Database is defined as a group of data which is interaction, kept with minimum of redundancy to serve many application in an optimal fashion.
Redundancy :
depository of is same data by is recurring.
if data able to be obtained from separate kept other data.
Redundancy cause the problem of when renewing (update data), extravagant depository room, and can generate its consistence do not data.
Database management system represent an software which consist of a group of program to manage and look after data in a structure used by many application, free (independence) to storage media and method access.
Benefit of database management system :
Data independence
Efficient data access
Integrity and data security
Data administration
Access congruent and
of crash recovery
Time development of application lessened
Database management system consist of four component :
Data
Hardware
Software
User
Data
Data to an data bases have characteristic integrated and usage with. At application which is big relative of data tend to be used by system of multi-user, while at application of relative small of data tend to be used by system of single-user.
system of Multi-User is an conducive system many consumer (user) can access data bases concurrently (concurrent). System of Single-User is an system with at most one consumer can access data bases at any given time.
Hardware
Consist of especial equipments in the form of depository assist and equipments of Input / output and processor of memory especial, and also equipments of supporter (for example for the equipments of network or equipments of other communications).
Software
Software for the system of data bases referred as by SMBD, representing coat among data bases physically with user. Especial function of SMBD is to become shield to consumer of hardware detail, so that consumer with knowledge of minimum regarding hardware can use databases system easily.
User
Application programming, that is in charge of write application program using databases.
Final consumer, that is consumer which is have interaction to with data bases system on-lonely pass terminal or workstation. Interface used many to water down interaction. Medium for certain consumer use facility update data by interactive with language of query, because more supple in giving function which do not be provided by interface. Language of query is standard language used to define and data manipulation in databases.
Administrator database (Database of Administrator), that is someone compiling policy decision and strategy concerning data, and provide requirement of technique support for the implementation of selected decision. Bases data Administrator hold responsible to usage of rights access to data bases, coordinated and watch usage of data bases, and to provide the source of software and hardware according to requirement. Thereby data bases administrator accountable for all system control at technique level.
Data model :
Flat-File
Hierarchy
Network
Relational
Object Oriented (OO)
Object Relational (OR)
Database is defined as a group of data which is interaction, kept with minimum of redundancy to serve many application in an optimal fashion.
Redundancy :
depository of is same data by is recurring.
if data able to be obtained from separate kept other data.
Redundancy cause the problem of when renewing (update data), extravagant depository room, and can generate its consistence do not data.
Database management system represent an software which consist of a group of program to manage and look after data in a structure used by many application, free (independence) to storage media and method access.
Benefit of database management system :
Data independence
Efficient data access
Integrity and data security
Data administration
Access congruent and
of crash recovery
Time development of application lessened
Database management system consist of four component :
Data
Hardware
Software
User
Data
Data to an data bases have characteristic integrated and usage with. At application which is big relative of data tend to be used by system of multi-user, while at application of relative small of data tend to be used by system of single-user.
system of Multi-User is an conducive system many consumer (user) can access data bases concurrently (concurrent). System of Single-User is an system with at most one consumer can access data bases at any given time.
Hardware
Consist of especial equipments in the form of depository assist and equipments of Input / output and processor of memory especial, and also equipments of supporter (for example for the equipments of network or equipments of other communications).
Software
Software for the system of data bases referred as by SMBD, representing coat among data bases physically with user. Especial function of SMBD is to become shield to consumer of hardware detail, so that consumer with knowledge of minimum regarding hardware can use databases system easily.
User
Application programming, that is in charge of write application program using databases.
Final consumer, that is consumer which is have interaction to with data bases system on-lonely pass terminal or workstation. Interface used many to water down interaction. Medium for certain consumer use facility update data by interactive with language of query, because more supple in giving function which do not be provided by interface. Language of query is standard language used to define and data manipulation in databases.
Administrator database (Database of Administrator), that is someone compiling policy decision and strategy concerning data, and provide requirement of technique support for the implementation of selected decision. Bases data Administrator hold responsible to usage of rights access to data bases, coordinated and watch usage of data bases, and to provide the source of software and hardware according to requirement. Thereby data bases administrator accountable for all system control at technique level.
Data model :
Flat-File
Hierarchy
Network
Relational
Object Oriented (OO)
Object Relational (OR)
