An index-organized table （IOT） called SPARSE has had many records deleted. Which command reorganizes the IOT so that the empty space is removed， while minimizing the impact for users？（）<br>A:EXPORT with TABLES and IMPORT with the INDEX and IGNORE options.<br>B:ALTER TABLE … COALESCE ；<br>C:ALTER INDEX …REBUILD ONLINE；<br>D:CREATE TABLE …AS SELECT_ONLINE；

An index-organized table （IOT） called SPARSE has had many records deleted. Which command reorganizes the IOT so that the empty space is removed， while minimizing the impact for users？（）
A:EXPORT with TABLES and IMPORT with the INDEX and IGNORE options.
B:ALTER TABLE … COALESCE ；
C:ALTER INDEX …REBUILD ONLINE；
D:CREATE TABLE …AS SELECT_ONLINE；

出自：Oracle认证

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