试题详情
- 单项选择题While designing your database， you have created the EMPLOYEEStable as an index-organized （IOT）. You want to create a bitmap index on the JOD_IDcolumn 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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