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Evaluate the following command：   SQL> CREATE TABLE design_data （id NUMBER， doc CLOB）  LOB（doc） STORE AS SECUREFILE（DEDUPLICATE）；   Which statement is true regarding the above command？（）  
A: The LOB values are automatically compressed.
B: The LOB values are cached by default in the buffer cache.
C: The LOB values are automatically stored in encrypted mode.
D: All LOB data that is identical in two or more rows in a LOB column share the same data blocks.

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出自：Oracle认证

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