MySQL

Database Languages

A database system provides a data definition language to specify the database schema and a data manipulation language to express

Underlying the structure of a database is the data model: a collection of conceptual tools for describing data, data relationships,

Databases change over time as information is inserted and deleted. The collection of information stored in the database at a

Danger of a Overkill: For small and simple applications for single users a database system is often not advisable. Complexity:

Using a DBMS to manage data has many advantages: Data independence: Application programs should be as independent as possible from

The database approach has some very characteristic features which are discussed in detail below: Concurrent Use A database system allows

Consider part of a savings-bank enterprise that keeps information about all customers and savings accounts. One way to keep the

The earliest business computer systems were used to process business records and produce information. They were generally faster and more

A database-management system (DBMS) is a collection of interrelated data and a set of programs to access those data. This

A DBMS has to be persistent, that is it should be accessible when the program created the data ceases to