Examine the following command that is executed for the TRANSPORT table in the SH schema:Which statement describes the significance of this command?()

题目内容(请给出正确答案)
Examine the following command that is executed for the TRANSPORT table in the SH schema:Which statement describes the significance of this command?()

A. It collects statistics into the pending area in the data dictionary

B. It creates a virtual hidden column in the CUSTOMERS_OBE table

C. It collects statistics with AUTO_SAMPLE_SIZE for ESTIMATE_PERCENT

D. It creates a histogram to hold skewed information about the data in the columns

参考答案和解析
参考答案:B
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