A collection of data associated with the organization and rank among logical links

2. A collection of data associated with the organization and rank among logical links

3. Databases used in large applications and systems that need to store information about this great application or system

4. 1. data2. Equipment 3. programs 4. users of databases

5. data must be characterized by complementarily and non-iterative and the possibility of participation by, and without accurate data, logical and correct there is no meaning to the database.

6. relying on the databases on magnetic disks a great addition to the units of the strips BACK UP-intensive units to store the backup data for the emergency circumstances.

7. the intermediate layer between the data stored in files, between users of the database, the most prominent of these programs is a database manager, a DBMS is a program that takes a very complex control mechanism and the elements of the code base in collaboration with the operating system

8. And divided into three categories:• program planners who write programs and use the possibilities of the database.• Mochas databases, and are responsible for the maintenance and operation of the database.• Users of databases dealing with the database through terminals.

9. There are many types of databases, but most notably on the scene and show three main types are:1. Databases, HIERARCHICL DATA BASE.2. Databases, NETWORK DATA BASE.3. Databases, RELATIONAL DATA BASE.The latter has become the most commonly used

10. data by using common characteristics found within the data set

11. Is an ordered set and repeated one kind of records on the vehicle body tree

12. Is the organization of the database that allows the relationships between the data network-like

13. 1. Create a new database.2. Treatment records.3. Retrieved records.4. Data protection.5. Development of benchmarks used in case of faults.6. Monitor the movement of data.7. Record of each transaction on the data.8. Put the data in the important priority.9. Keeps the data for any comprehensive data about users, and the powers available to them.

14. 1. Adjust the stored data.2. Issuance of reports.3. The integrity of data and databases.4. Add and update the data.5. Verification of non-repetitive data.6. Verification of complementary data.

15. 1. shall report progress based on a comprehensive updated information.2. Savings in cost for non-repetitive data.3. Availability of effort in data entry by the consolidation of inputs.4. Extreme simplicity in the use of SQL language because the database manager shall hold office for dealing with the data.5. Reduce the number of individuals working in the Information Center.6. Good management of the data.

16. 1. Added possibility.2. easy retrieval.3. update the data.4. delete data from files.5. can modify the software without modifying the data and vice versa.6. can impose restrictions, insurance and confidentiality on some important data.

17. 1. space: up to provide all the databases to the various special services users 2. the problems of the entity of the base compiler: a database manager that a complex program requires to absorb and understand it by the officials of the information system 3. Cost: The program director in charge of the database itself, if we add the cost to the rest of the elements of cost (and storage media - memory) 4. stop the database: problems or programmatic entity affect a broad spectrum of users the harmful effects