Oracle 상용 sql 구문

   1.  ----***********Oracle 복사 표 데이터×××××××××××-----

---        
create table DEPT_BAK as select * from DEPT 

----      
create table DEPT_BAK2 as select * from DEPT where 1<>1

----         sql
create table salgrade_bak1 as  select grade, losal, hisal from salgrade where 1<>1
---drop table salgrade_back1

----                
create table salgrade_bak2 as select grade, losal, hisal from salgrade
--------*************               ，        ***************

----insert into                 
insert into salgrade_bak1
  (grade, losal, hisal)
select ss.grade,ss.losal,ss.hisal from salgrade ss where ss.grade in (1,5)

----        (     where  )
 delete salgrade_bak1