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Consider the following statement：   SQL> EXECUTE DBMS_STATS.GATHER_SHEMA_STATS （-  2> ownname => ‘OE’， -  3> estimate_percent => DBMS_STATS.AUTO_SAMPLE_SIZE， -  4> method opt => ‘for all columns size AUTO’）；   What is the effect of ‘for all columns size AUTO’ of the METHOD_OPT option？（）
A:The Oracle server creates a new histogram based on existing histogram definitions for all table, column, and index statistics for the OE schema. 
B:The Oracle server creates a histogram based on data distribution regardless of how the application uses the column/s for all table, column, and index statistics for the OE schema.
C:The Oracle server creates a histogram based on data and application usage of the column/s for all table, column, and index statistics for the OE schema. 
D:The Oracle server creates a histogram based on application usage, regardless of data distribution, for all table, column, and index statistics for the OE schema.

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出自：Oracle认证

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