Which statement describes the ROWID data type? （） A:Binary data up to 4 gigabytes. B:Character data up to 4 gigabytes. C:Raw binary data of variable length up to 2 gigabytes. D:Binary data stored in an external file, up to 4 gigabytes. E:A hexadecimal string representing the unique address of a row in its table.

Which statement describes the ROWID data type? （）
A:Binary data up to 4 gigabytes.
B:Character data up to 4 gigabytes.
C:Raw binary data of variable length up to 2 gigabytes.
D:Binary data stored in an external file, up to 4 gigabytes.
E:A hexadecimal string representing the unique address of a row in its table.

出自：Oracle认证

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