Wednesday, 1 October 2014
Thursday, 1 May 2014
Software
Software
Software is the programs that run on a computer, a program is a set of instructions for a computer to execute. Software can preform lots of different tasks. It is used around the world by lots of programmers
Thursday, 13 March 2014
Databases
Databases
Key Words:
Serial File: A file of items one after another
Sequential File: A serial file in order
Entity: Something that we store data about in a database
Record: All the data about one item in a database
Attribute: A characteristic of an entity. It becomes a field in a data table
Field: A characteristic of something stored in a database
Indexed sequential file: A sequential file that is accessed using an index,
which is a separate file.
Flat File Database: Database consisting of only one table
Primary Key: A primary key is a unique value so hat a record in the table
can be identified without any mistake.
A database is an organized collection of data. The data are normally organized to model relevant aspects of reality in a way that supports processes requiring this information. For example, modelling the availability of rooms in hotels in a way that supports finding a hotel with vacancies.
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