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13 Cards in this Set
- Front
- Back
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Flat-file Database |
May contain a number of single tables with no links between them.
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Relational Database |
A database which contains anumber of linked tables. |
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Primary Key |
A primary key is a field which uniquely identifies a record in a database. |
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Foreign Key |
A foreign key is a primarykey from one table included in another table to form a link. |
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Index |
Used to improve accesstimes to records. |
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3rd Normal Form |
The data items aredependent on the key, the whole key and nothing but the key. |
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Data Redundancy |
Storing of the same data more than once. |
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Data Consistency |
Due to data being stored only once, all instances of data will be updated if a change is made. |
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Data Independence |
Data in a database should be able to be used on any other database application. |
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Data Warehousing |
Where large quantities of data are collected together from a variety of locations for efficient analysis. |
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Data Mining |
The analysis of large amounts of data (in a data warehouse) to provide new information or find patterns. |
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Database Administator |
The person in a company who is responsible for the structure and management of the database system and the data in it. |
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Query Language |
Used when a user wants to search data in database. |
