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create sequence JOBSEQ
minvalue 1
maxvalue 999999999999
start with 1
increment by 1
cache 20;
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select job,count(empno) from emp
where job in(select job from emp group by job having min(sal)>1500)
group by job;
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select e.ename,d.dname,m.ename,e.sal,sa. ......

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sqlplus> select * from nls_database_parameter
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...
NLS_CH ......

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create table emp1
as
select * from emp where deptno = 20;
updateµôemp1ÖеIJ¿·ÖÊý¾Ý
update emp1
set sal = sal + 100,
comm = nvl(comm,0) + 50
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backup.sh
rq=`date '+%Y%m%d%H%M'`
su - oracle -c "exp zjhk/zjhk_123 owner=zjhk file=/home/oracle/zjhk_$rq.dmp"
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