Page 64 - Demo

%u062c%u0645%u064a%u0639 %u0627%u0644%u062d%u0642%u0648%u0642 %u0645%u062d%u0641%u0648%u0638%u0629 %u0640 %u0627%u0625%u0644%u0639%u062a%u062f%u0627%u0621 %u0639%u0649%u0644 %u062d%u0642 %u0627%u0645%u0644%u0624%u0644%u0641 %u0628%u0627%u0644%u0646%u0633%u062e %u0623%u0648 %u0627%u0644%u0637%u0628%u0627%u0639%u0629 %u064a%u0639%u0631%u0636 %u0641%u0627%u0639%u0644%u0647 %u0644%u0644%u0645%u0633%u0627%u0626%u0644%u0629 %u0627%u0644%u0642%u0627%u0646%u0648%u0646%u064a%u062964Rapid response to users' data and information needs Good data management as data can be saved in a unified central database for all the organization or organization Database types: There are many types of databases, but the most prominent and visible are three main types: 1.Hierarchical databases HIERARCHICL DATA BASE. 2.NETWORK DATA BASE. 3.RELATIONAL DATA BASE. The latter type has become the most widely used and common Hierarchical DBMS: It organizes the data in a hierarchical form, or in the form of an inverted tree, that is, its root is at the top and the branches emerge from it, as this structure is like a family tree; She has one grandfather, and the grandfather has several sons, and the sons are the fathers of the grandchildren, and it is impossible for a grandson to have more than one father. Hierarchical files are files that have the same tree structure, and have the same relationships between records, an example of some types of records that can exist in a hierarchy, there are multiple sales records for each vendor; There is one stats record for each running process, and there are also several customer records for each vendor; As each seller has specific customers, and each customer can have multiple accounts receivable records, one record for each unpaid purchase. It is important to understand that it is not necessary for all files in the database to communicate with each other, all that is required is for files that are used as a group to communicate with each other in applications. And past sales records have such a logical relationship and are called \ A set is a set of records connected to each other logically. Thus, a hierarchical database is an assembly of files, and file classes that are logically connected to each other. The Information Management System (IMS) prepared by IBM uses hierarchical configuration, and it is one of the largest and most complex DBMS, and for this reason it requires a high level of experience to work with, and in any case it is strong and has proven great efficiency in