Data Dictionary
Download as PPT, PDF3 likes2,794 views
A data dictionary contains metadata that describes the entities, attributes, data types, sizes, validation rules, and keys of data stored in a database. It is produced during database modeling and does not store actual data. The example shows a data dictionary for a school database that would store information about pupils and tutor classes, including each pupil's name and tutor class.
1 of 6
Downloaded 58 times
More Related Content
What's hot (20)
Ad
Viewers also liked (20)
Ad
Similar to Data Dictionary (20)
More from Forrester High School (20)
Recently uploaded (20)
Data Dictionary
- 2. Data Dictionary A data dictionary is a document which contains information about the different data items in a database. The data dictionary should store information about the following: Entity (table) Attribute (field) Data Type Size (length) Validation Keys
- 3. Data Dictionary - Example Duncastle High School want to use a database to store information about their tutor classes. The database should store information about each pupil in the school, and each tutor class. Sample data is shown below: Pupil Tutor Class
- 4. Data Dictionary - Example Duncastle High School want to use a database to store information about their tutor classes. The data dictionary for this database would look as follows:
- 5. Data Dictionary A data dictionary is produced as part of the database modelling process. The data dictionary does not store any actual data, only information about the data (metadata) There is no one set standard in terms of layout or the level of detail to which a data dictionary should be written.
- 6. Data Dictionary A data dictionary is produced as part of the database modelling process. The data dictionary does not store any actual data, only information about the data (metadata) There is no one set standard in terms of layout or the level of detail to which a data dictionary should be written.