变质(alteration)

A . 插入 B . 修改 C . 删除 D . 清除

A、同时修改字段数据类型和长度 B、修改计算列 C、产量 float D、同时删除字段和字段约束

A . identify B . identifier C . identity D . identificatio

A . ALTER B . DELETE C . DROP D . MODIFY

A . a， b， c， d， e B . e， d， a， b， c C . a， c， b， d， e D . d， b， c， a， e E . a， c， b， e， d

A . It cancels all pending disk drops within the disk group. B . It restores disks that are being dropped as the result of a DROP DISKGROUP operation C . It mounts disks in the disk group for which the drop-disk operation has already been co pleted D . It restores all the dropped disks in the disk group for which the drop-disk operation has already been completed E . It adds previously dropped disks back into the disk grou

A . DCL B . DDL C . DML D . DQL E . 以上所述都不正确

A . 删除 B . 替换 C . 插入 D . 清除

A . A、更改数据库名称 B . B、文件组名称 C . C、数据文件 D . D、日志文件的逻辑名称

A .  It cancels all pending disk drops within the disk group. B .  It restores disks that are being dropped as the result of a DROP DISKGROUP operation C .  It mounts disks in the disk group for which the drop-disk operation has already been co pleted D .  It restores all the dropped disks in the disk group for which the drop-disk operation has already been completed E .  It adds previously dropped disks back into the disk grou

A．数据操作语言(OML) B．数据定义语言(DDL) C．数据查询语言(DQL)

A．0.89个月 B．1.56个月 C．1.41个月 D．3.02个月

是 否

是 否

A:对 B:错

A．可以增加主要数据文件 B．可以删除次要数据文件 C．可以修改文件的增容方式 D．可以增加事务日志文件

A. It cancels all pending disk drops within the disk group B. It restores disks that are being dropped as the result of a DROP DISKGROUP operation C. It mounts disks in the disk group for which the drop-disk operation has already been completed D. It restores all the dropped disks in the disk group for which the drop-disk operation has already been completed E. It adds previously dropped disks back into the disk group