Pass4sure 1Z0-050 Question Answer

Examine the following command that is executed for the TRANSPORT table in the SH schema: SQL> SELECT DBMS_STATS.CREATE_EXTENDED_STATS('sh', 'customers_obe', '(country_id, cust_state_province)') FROM dual; 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.

Answer: B