试题详情
- 单项选择题While designing your database， you have created the EMPLOYEES table as an index-organized table （IOT）. You want to create a bitmap index on the JOB_ID column to make queries faster. Which task must have been completed so that you are able to create the bitmap index？（）
A、A primary key must have been created.
B、A mapping table must have been created.
C、An overflow tablespace must have been specified.
D、The PCTTHRESHOLD option must have been specified.
- B
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