What are the characteristics of the database? Who are the targets?

The characteristic database management system combines data with a certain structure into a set, which has the following characteristics: 1. The data in the data structured database are not chaotic and irrelevant, they have a certain organizational structure, and the data belonging to the same set have similar characteristics. 2. Enjoy the data * * * There is a lot of repetitive information among various departments of a unit. The purpose of using database is to manage this information in a unified way, reduce redundancy and make all departments enjoy the same data. 3. Independence of data Independence of data refers to the independence between data recording and data management software. Data and its structure should be independent, and the application should not be changed. 4. Data integrity Data integrity refers to ensuring the correctness of data in the database. There are many reasons for incorrect data, and the database management system manages it by checking the nature of the data. 5. Flexibility of data The database management system is not a simple data stacking, but has various management functions such as input, output, query, editing and modification on the basis of recording data information. 6. Security of data According to users' responsibilities, people of different levels have different rights to the database, and the database management system should ensure the security of data.