A.ORACLE是一项数据存储技术，利用这项技术可以有效地提高磁盘的空间利用率
B.ORACLE是一家IT公司，以提供高效能的数据库硬件及配套软件产品而著称
C.ORACLE是一套数据库行业标准，所有SQL都要符合此标准
D.ORACLE是美国的一家软件公司，以提供同名的数据库产品而著称
E.以上所述都不正确

A.临时表空间TEMP
B.用户表空间USER
C.索引表空间INDEX
D.系统表空间SYSTEM

A.DBWn
B.LGWR
C.SMON
D.PMON
E.ARCn

A.DBWn
B.LGWR
C.SMON
D.PMON
E.RECO

A.1
B.2
C.3
D.4
E.由初始参数指定

A.select last_date(sysdate) from dual;
B.select finally_day(sysdate) from dual;
C.select last_day(sysdate) from dual;
D.select tail_day(sysdate) from dual;

A.select to_char(sysdate,'D') from dual;
B.select to_char(sysdate,'W') from dual;
C.select to_char(sysdate,'D')-1 from dual;
D.select to_char(sysdate-1,'D') from dual;
E.select to_char(sysdate-1,'W') from dual;

A.select * from emp where hiredate>='19820101';
B.select * from emp where hiredate>=to_char('19820101','YYYYMMDD');
C.select * from emp where to_date(hiredate,'YYYYMMDD')>='19820101';
D.select * from emp where to_char(hiredate,'YYYYMMDD')>='19820101';

A.select * from emp where comm='';
B.select * from emp where comm=null;
C.select * from emp where nvl(comm)=0;
D.select * from emp where comm is null;
E.select * from emp where nvl(comm,0)=0;

A.select * from emp wher sal in (2000,3000);
B.select * from emp wher sal like (2000,3000);
C.select * from emp wher sal = (2000,3000);
D.select * from emp wher sal between 2000 and 3000;

A.select * from emp where ename in 'S%';
B.select * from emp where ename='S%';
C.select * from emp where ename like 'S%';
D.select * from emp where ename like 'S_';