A、ALTER TABLE USER RENAME AS USERINFO;
B、RENAME TO USERINFO FROM USER
C、RENAME USER TO USERINFO;
D、RENAME USER AS USERINFO
答案：C
A、ALTER TABLE USER RENAME AS USERINFO;
B、RENAME TO USERINFO FROM USER
C、RENAME USER TO USERINFO;
D、RENAME USER AS USERINFO
答案：C
A. dba_*
B. user_*
C. all_*
D. sys_*
A. 1
B. 2
C. 3
D. 4
A. 系统账号
B. 临时账号
C. 临时数据
D. 日志记录
A. 上线试运行申请、上线试运行、上线试运行验收
B. 上线试运行测试、上线试运行、上线试运行验收
C. 上线试运行申请、上线试测试、上线试运行验收
D. 上线试运行申请、上线试运行测试、上线试运行和上线试运行验收
A. 管理信息内网与外网之间
B. 管理信息大区与生产控制大区之间
C. 总部与各省电力公司网络之间
D. 各省电力公司与地市供电公司网络之间
A. 主键
B. 唯一索引
C. rowid
D. 全表扫描
A. A． 启动参数配置：-Djava.security.egd=file:/dev/./urandom
B. 启动参数配置：-Djava.security.egd=file:/dev/urandom
C. 配置java.security文件中的securerandom.source=file:/dev/urandom
D. 配置java.security文件中的securerandom.source=file:/dev/./urandom
A. 应急演练
B. 模拟演练
C. 现场推演
D. 故障演练
A. SELECT ename, hiredate FROM emp WHERE ename like ＇G%＇
B. SELECT last_name, hiredate FROM emp WHERE ename == ＇G%＇
C. SELECT last_name, hiredate FROM emp WHERE ename in ＇G%＇
D. SELECT ename, hiredate FROM emp WHERE ename like ＇G___＇
