Database

State and explain the components of a database A database is a integrated collection of eternize books or data on a finicky topic that is stored in a system. Before computers address books, display panel indexes and telephone books were each(prenominal) types of databases. Computer databases enable the user to get along and manipulate the nurture that has been stored on the system. The computer database allows the user to stimulation data from a variety of sources into the fields of a record and then access this data through reports and queries.. The records retrieved in break up to queries are information that mint be used to start out decisions Computer database breaks down information into the smallest size. Each piece of information is input into a field. An example would be a induce and address would not be listed in the normal elan but would be entered into separate fields like original name, surname, address first line, Town County and country. A complete slump of fields relating to one topic is called a record. . All the records in the collection are stored on a accede. The table can be viewed in datasheet view which is in columns for the fields and rows for the records or form view ? this presentation is more like a paper form.

The form view is often designed to guardianship the end user to input of information into each record in a friendly onscreen format. Tables can be sorted in a variety of ways including a-z, z-a, numerically, dated, etc A saucer-eyed query of the above example could consist of all records with Kildare in the county field. This would return a list of the names and address of all people living in county Kildare. Each record on a table can be assigned a primary key which is normally a number and is in any case a field in the record. This is a ludicrous ID. This unique primary key allows records from different tables to be linked unitedly in relational databases. This is were useful and is the basis of data wariness information systems. Using the sample above if another table was... If you want to get a full essay, order it on our website: Orderessay

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