The database is used widely in the environment around him: one day people can have many activities require communication with the database like: go to the Bank to withdraw the money and send the money, sign up on the aircraft or at the hotel, visit the library of information goods have to find books , purchased the magazine in a Publisher ... In banks, stores, it is also updated automatically managing money or goods. Schools, businesses, hospitals, ... For example, you can use the database to store the largest muscle of the personal contact information of teachers, staff, students. The database will include a table that describes the student with columns for name, gender, year of birth, address, number of students, grades etc. And a different database on several points including the student code, grade point average, a. v.. v we use database and want to search the student average score last year over 8.0. Then two computer generation, linked together via the student code. Should the information between the tables linked together, we can help find information easily and quickly. . Or the company in sales, customer personal information is managed by the database, when you are a manager of a food trading company, you can use the relation database to check sales, order entry, customer source increase or decrease ...
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