Examine the SQL statements that creates ORDERS table: <img src="/Image1/9f/9f116ada103258db5aa1775588a7cad7.jpg" /> For which columns would an index be automatically created when you execute the above SQL statement? （） A:SER_NO B:ORDER_ID C:STATUS D:PROD_ID E:ORD_TOTAL F:Composite index on ORDER_ID and ORDER_DATE

Examine the SQL statements that creates ORDERS table:

For which columns would an index be automatically created when you execute the above SQL statement? （）
A:SER_NO
B:ORDER_ID
C:STATUS
D:PROD_ID
E:ORD_TOTAL
F:Composite index on ORDER_ID and ORDER_DATE

出自：Oracle认证

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