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Which group has caused such agricultural problems as downy mildew, potato blight, and an avocado disease?
Relationship
In a relational database, a link between tables that defines how the data is related.
Unstructured Data
Information that does not have a pre-defined data model or is not organized in a pre-defined manner.
Data Dictionary
A centralized repository of information about data such as meaning, relationships to other data, origin, usage, and format.
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