SQL> ed
已写入 file afiedt.buf1  create view empincomeview2  as3  select e.empno,e.ename,e.sal,e.sal*12 annualsal,e.sal*12+nvl(comm,0) income,d.dname4  from emp e,dept d5* where e.deptno=d.deptno
SQL> /
create view empincomeview*
第 1 行出现错误:
ORA-01031: 权限不足

SQL> ed
已写入 file afiedt.buf1  create or replace view empincomeview2  as3  select e.empno,e.ename,e.sal,e.sal*12 annualsal,e.sal*12+nvl(comm,0) income,d.dname4  from emp e,dept d5*  where e.deptno=d.deptno
SQL> /视图已创建。

SQL> drop view empincomeview;视图已删除。

SQL> create sequence myseq;序列已创建。SQL> select * from tab;TNAME                          TABTYPE  CLUSTERID
------------------------------ ------- ----------
BIN$QdtFwotIQY2TnKXqPH7lHw==$0 TABLE
BONUS                          TABLE
DEPT                           TABLE
EMP                            TABLE
EMPINCOME                      TABLE
SALGRADE                       TABLE
STUDENT                        TABLE
TB_DEPT                        TABLE
TEST7                          TABLE
TEST99                         TABLE
TESTSP                         TABLE已选择11行。SQL> create table tableA(tid number,tname varchar2(20));表已创建。SQL> select myseq.currval from dual;
select myseq.currval from dual*
第 1 行出现错误:
ORA-08002: 序列 MYSEQ.CURRVAL 尚未在此会话中定义SQL> select myseq.nextval from dual;NEXTVAL
----------1SQL> select myseq.currval from dual;CURRVAL
----------1SQL> insert into tableA values(myseq.nextval,'aaa');已创建 1 行。SQL> insert into tableA values(myseq.nextval,'bbb');已创建 1 行。SQL> insert into tableA values(myseq.nextval,&name);
输入 name 的值:  ccc
原值    1: insert into tableA values(myseq.nextval,&name)
新值    1: insert into tableA values(myseq.nextval,ccc)
insert into tableA values(myseq.nextval,ccc)*
第 1 行出现错误:
ORA-00984: 列在此处不允许SQL> insert into tableA values(myseq.nextval,&name);
输入 name 的值:  'ccc'
原值    1: insert into tableA values(myseq.nextval,&name)
新值    1: insert into tableA values(myseq.nextval,'ccc')已创建 1 行。SQL> select * from tableA;TID TNAME
---------- --------------------3 aaa4 bbb5 cccSQL> select * from user_sequences;SEQUENCE_NAME                   MIN_VALUE  MAX_VALUE INCREMENT_BY C O CACHE_SIZE LAST_NUMBER
------------------------------ ---------- ---------- ------------ - - ---------- -----------
MYSEQ                                   1 1.0000E+28            1 N N         20          21SQL> drop sequence myseq;序列已删除。SQL>