You have a large amount of historical data in an operating system file. Some analysts in your organization need to query this data. The file is too large to load into your current database. Which is the most effective method to accomplish the task?()
A. Upgrade the hardware/memory to accommodate the data.
B. Load the data into your database by using the PARALLEL clause.
C. Give analysts DBA privilege, so that they can query DBA_EXTERNAL_TABLE
D. Use an external table so you can have the metadata available in your database, but leave the data in the operating system files.
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干空气和水蒸气的混和气体称为湿空气,湿空气中水蒸气的含量很多。
A. 正确
B. 错误
《供电营业规则》第三十四条规定:用户办理改压手续时,改为高一等级电压供电,超过原容量者,超过部分按()办理。
根据《危险化学品安全管理条例》,有关单位和个人对依法进行的危险化学品安全监督检查应当予以配合,不得拒绝、阻碍。
A. 正确
B. 错误
斗轮机上机电压为(),电源引自厂用6KV()段。供电方式采用(),信号电缆同样采用该种方式。设编码器的位置有()、()、()。