A、蓄电池熔断器
B、直流开关
C、旁路检修开关
D、负载端电源开关
答案:D
A、蓄电池熔断器
B、直流开关
C、旁路检修开关
D、负载端电源开关
答案:D
A. select ename,hiredate from emp where ename = 'FORD';
B. select ename,hiredate from emp where hiredate > (select hiredate from emp where ename = 'FORD');
C. select ename,hiredate from emp where hiredate > min(hiredate) and ename = 'FORD';
D. select ename,hiredate from emp where hiredate in (select hiredate from emp where ename = 'FORD');
A. sysdate;
B. select sysdate;
C. select sysdate from dual;
D. select sysdate from common;
A. initcap
B. instr
C. trim
D. concat
A. Statspack是Oracle的性能分析工具
B. Statspack不仅仅能分析数据库级性能问题,还能分析SQL性能
C. Statspack报告可以通过任意两个采样点生成
D. Statspack可以自动采集采样点
A. CONNECT
B. RESOURCE
C. DBA
D. SCOTT
A. 索引段
B. 临时段
C. 回滚段
D. 代码段
A. DBA_TABLES
B. V$DATAFILE
C. V$INSTANCE
D. V$DATABASE
A. 鉴别、认证
B. 鉴别、授权
C. 验证、授权
D. 验证、备案
A. AIX安装正在进行中
B. rootvg卷组已损坏
C. TCP/IP配置不正确
D. 至少有一个寻呼设备不能更改
A. LOGFILE_DEST
B. ORACLE_HOME
C. BACKGROUND_DUMP_DEST
D. CORE_DUMP_DEST