Answer: the size of the disk storage disk.
The Data Dictionary stores meta data (data about the database). A
data dictionary is a centralized repository of metadata.
Data dictionary include:
• The names of fields contained in the database
• What table(s) exists in database
• The data types of all fields in the organization’s databases
• The sizes, of all fields in the database
• A description of what each database field means
• The source of the data for each database field
• A list of applications that reference each database field
• The relationship between fields in all of the organization’s databases
• Default values that exist for all fields in all of the organization’s
databases
• Who has access to each field
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