The database, it must consider the control and management of the accuracy and efficiency in information retrieval, database principal component assembly with
4 parts including
2.1.1 data (Data) data in the database will be qualified 2 folds
- Total Integrate) database is a collection of data files It possesses complete in order to reduce the redundant data between files
.- shared (Share) data in database can be used to divide each piece used between various users in the system
2.1.2 hardware (Hardware). Contains data storage device such as a magnetic I / O, device Device controller, I / O channels,,The processor and main memory
2.1.3 software (Sorftware) connection between the database and the medium is used. DBMS is a software, the most important of the database. Also, Utility Application Develoment tool Desisn AIDS Report,,, Writers ect.
, 2.2 database
.The production of textbooks on computer, have said that the database (Database) is related to the application of data collecting system to facilitate information management and increase the security of access to information.In the early days will use how to create data files (Flat Files) using computer programming languages such as Pascal, C programming language or COBOL. Create a data file according to the method of language. The problem as is.And cause problems in the compatibility of data. Data files generated from various computer languages, a structure model of language files that it cannot use the information sharing. Such as data files for students.Cannot be used with the program work rule derived from the C programming language. Because the structure is different. The two departments agencies must separate input can be linked or copy the data ให้กันและกัน.Such as have students quit or change the name, change of address, must execute edit both 2 part, otherwise will cause problems of conflict information. Is asynchronous, causing problems follow.Database management database management system and through Data Base Management System (DBMS), which will help solve the problems. All because of information system will be kept together as a single source.
การแปล กรุณารอสักครู่..