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單項選擇題

Click the Exhibit(s) button to view the EMPLOYEES table. 



The EMPLOYEE table contains thousands of rows. The EMP_CODE column is the primary key column. At the end of every month, you are required to perform search queries based on the BASIC_SAL+COMM column values. Which type of index will you create?()      

A. B-tree Index
B. Bitmap Index
C. Function-based Index
D. Partitioned Index

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