1. Database Design and Development
Data Dictionary

2. Learning Intention
I will learn about data dictionaries.

3. Data Dictionaries We already know
how to graphically show the relationship between two or more entities
how to identify primary and foreign keys
the available attribute types
that we set the size of an attribute
the 4 types of validation we can add to an attribute:
range check, presence check, field length and restricted choice

4. Data Dictionaries
A data dictionary is used to indicate the properties of each attribute we need to define the entities in a database.
Data dictionaries contain the following:
name of each entity
name of all attributes for each entity
type of data held by each attribute
size of each attribute
which attributes and primary and foreign keys
validation rules to be applied to each attribute

5. Pupil Task
Complete the Data Dictionaries Task sheet on your computer.

6. Success Criteria
I can describe and exemplify a data dictionary to design a database.