Glossary - D to F

Data Migration Glossary This data migration glossary has been split into sections for faster loading. You can access the complete glossary by following the link, or use the search engine below to find specific terms. Search DataLynx

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D

Dip Sample

• The process of taking a small random selection of records from a set of records. This is usually part of quality control. The sample records are examined carefully as an indication of quality for the whole set.

Data

• Distinct pieces of information, usually formatted in a precise way so as to be useful.

Database

• A collection of data organised so that it can easily be accessed, analysed and updated. The current leading databases include Oracle, Sybase and Microsoft's SQL Server. Most modern relational databases can be accessed using a language called SQL.

Data Dictionary

• In database management systems, a file that defines the basic organisation of a database. A data dictionary contains a list of all files or tables in the database, the number of records in each file, and the names and types of each field.

Data Hub

• See Hub

Data Integrity

• See Integrity

Data Migration

• see Migration

Data Mapping

• see Mapping

Data Mart

• see Mart

Data Warehouse

• see Warehouse

Data Weeding

• see Weed

DBMS

• Short for Database Management System, see database.

Distributed Database

• A database that consists of two or more data files located at different sites on a computer network. Because the database is distributed, different users can access it without interfering with one another.

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E

EAI - Enterprise Application Integration

• A term for the plans, methods, and tools aimed at modernising, consolidating, and coordinating the computer applications in an enterprise. Typically, an enterprise has existing legacy applications and databases and wants to continue to use them while adding or migrating to a new set of applications.

EBCDIC

• A numeric code for alpha-numeric characters developed by IBM, similar in nature to ASCII which has more or less replaced EBCDIC as the normal standard. However many legacy systems and databases still store their data using EBCDIC.

ETL

• The generic name for software which Extracts, Transforms and Loads data.

Enterprise

• an enterprise is an organisation that uses computers.

Extract

• the act of getting a copy of data from a database in a format which is useful.

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F

Field

• A space allocated for a particular item of information. In database systems, fields are the smallest units of information you can access. In spreadsheets, fields are called cells.

File

• A collection of data or information that has a name, called the filename. Almost all information stored in a computer must be in a file.

Flat-File Database

• A relatively simple database system in which each database is contained in a single table (or file). In contrast, relational database systems can use multiple tables to store information, and each table can have a different format.

Format

• A specific pre-established arrangement or organisation of data

Full record Print

• Printed report containing all or most of the data from a record

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