You need to create a partitioned table to store historical data and you issued the following command: CREATE TABLE purchase_interval PARTITION BY RANGE (time_id) INTERVAL (NUMTOYMINTERVAL(1,’month’)) STORE IN (tbs1,tbs2,tbs3) ( PARTITION p1 VALUES LESS THAN(TO_DATE(’1-1-2005’, ’dd-mm-yyyy’)), PARTITION p2 VALUES LESS THAN(TO_DATE(’1-1- 2007’, ’dd-mm-yyyy’))) AS SELECT * FROM purchases WHERE time_id < TO_DATE(’1-1-2007’,’dd-mm-yyyy’); What is the outcome of the above command?()
A. It returns an error because the range partitions P1 and P2 should be of the same range.
B. It creates two range partitions (P1, P2). Within each range partition, it creates monthwise subpartitions.
C. It creates two range partitions of varying range. For data beyond ’1-1-2007,’ it creates partitions with a width of one month each.
D. It returns an error because the number of tablespaces (TBS1,TBS2,TBS3)specified does not match the number of range partitions (P1,P2) specified.
查看答案
造成结构滞后性的原因有().
A. 新、旧结构交替有一定的时间过程
B. 战略改革遇到障碍
C. 管理人员的抵制
D. 以上均正确
有误和水垢将造成冷凝器冷压力升高。
A. 正确
B. 错误
《北京市物业管理办法》实施后申请办理商品房预售许可或现房销售的住宅物业项目,建设单位承担前期物业服务责任。建设单位提供前期物业服务的方式有:()
A. 自行提供前期物业服务
B. 将全部专项服务委托给具备资质的物业服务企业
C. 将专项服务委托给符合相关资质要求的专业性服务企业
D. 将全部专项服务委托给专业性服务企业
E. 将全部专项服务委托给个人
证券投资不可能作为电力企业的投资。
A. 正确
B. 错误