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 () refers to data that is inconvenient to use the two-dimensional logical table of the database to represent, including office documents in all formats, text, pictures, XML, HTML reports, images, audio and video information, etc.

 () refers to data that is inconvenient to use the two-dimensional logical table of the database to represent, including office documents in all formats, text, pictures, XML, HTML reports, images, audio and video information, etc.
A .  File data
B .  Structured data
C .  Block data
D .  Unstructured data

Answer: D

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