| A | B |
|---|
| asymmetric encryption | different key to encrypt and decrypt |
| attribute | part of an entity eg surname of student |
| character | smallest unit of data can include letters numbers special symbols |
| data dictionary | comprehensive description of each attribute |
| data mining | process to find hidden patterns |
| data redundancy | unwanted duplication |
| data security | involves a series of safeguards to protect data |
| data warehousing | process store large amts of data from different sources |
| dbms | data base management system |
| direct access | records are searched according to location |
| distributed database | databases connected but in different geographical locations |
| encryption | process of encoding files |
| entity | special thing about info collected eg students |
| erd | type of schema that shows reltionships between entities |
| field | specific category of data |
| flat file | data organised in a single table |
| foreign key | not the primary key in another table |
| form | used to view enter and change data |
| directories | lists of websites into categories |
| hypertext | system that allows documents to be cross-linked |
| inf | moving data into separate tables |
| metadata | data about data, describes chgarach |
| normalisation | process of examining schema and removing redundant categories |
| primary key | unique must have a value |
| query by example | enter crieria against a field |
| record | collection of facts about one entry in database divided into fields |
| relationship | ways the entities are reted to each other |
| secondary key | often used as a field in searching but is not unique |
| sequential access | each record is searched in order |
| sql | query language to access and manipulate data |
| symmetric encryption | same key to encrypt and decrypt |
| tuple | row in a table |
| schema | organised plan of the database |
| file | block of data divided into records |
| keys | fields used tyo sort and retrieve info |
| table | info about an entity |
| operators | character symbols indicating relationships |
| search engine | database of indexed websites |
| boolean qualifies | AND NOT OR |
| hypermedia | any object displayed on screen that links to other info |
