备份程序都是调用VDAP的接口来和vmdk建立连接的()
A. Connect/ConnectEx
B. GetTransportModeAPI
C. Disconnect API
D. VMware Storage API
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AIX系统中,通过以下()命令可以判定rootvg中的PV是否发生故障()
A. lsvg –p rootvg
B. lsvg rootvg
C. lsdev
D. lsdisk -l
oracle查看处于备份模式的数据文件的指令是()
A. select * from dba_data_files
B. ALTER TABLESPACE USERS END BACKUP;
C. select * from v$backup;
D. select * from dba_data_files
关系数据库中,当运用Transact-SQL语句创建主键时,可以是()
A. create table table1 (column1 char(13) not null primary, column2 int not) on primary
B. alter table table1 with notcheck add(column1) on primary
C. ALTER TABLE1 ADD constraint [PK_table1] primary key nonclustered
D. alter table table1 column1 primary key
E. ADD primary key column1