You observed that some of the queries are performing poorly on the SALES_RECORDS table in your database.
On further investigation, you find that at the end of each day the contents of the SALES_RECORDS table are transferred to the SALES table and deleted from the SALES_RECORDS table. The deleted operations cause the table to be sparsely populated.
The SALES_RECORDS table has Automatic Segment Space Management (ASSM) and row movement enabled. The table is accessible in 24×7 mode.
What is the most efficient method to improve the performance?
A. Perform EXPORT, DROP, and IMPORT operations on the SALES_RECORDS table sequentially.
B. Shrink the SALES_RECORDS table by using the ALTER TABLE…SHRINK SPACE command.
C. Move the SALES_RECORDS table to a different location by using the ALTER TABLE…MOVE command.
D. Deallocate the space in the SALES_RECORDS table by using the ALTER TABLE…DEALLOCATE UNUSED command.
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