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While designing the database for one of your online transaction processing （OLTP） applications， you want to achieve the following：  a） high availability of data  b） faster primary key access to the table data  c） compact storage for the table  Which type of tables would you use to achieve these objectives？（） 
A:heap tables
B:object tables
C:partitioned tables
D:index-organized tables （IOTs）

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出自：Oracle认证

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