what eliminate duplicate without using roenum and not

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Question Posted / amar_kondla

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what eliminate duplicate without using roenum and not..

Answer / madhav

DELETE FROM emp1 A WHERE ROWID > (SELECT min(rowid)
FROM emp1 B
WHERE A.empno = B.empno);

---conn scott/tiger@orcl
create table emp1 as select*from emp;
14 rows inserted
SQL> select*from emp1;

14 rows selected
-----------
insert into emp1
selectempno,ename,job,mgr,hiredate,sal,comm,deptno from emp;

14 row inserted

select*from emp1;

28 rows slected --(14 duplicates row are there)

you can use starting query duplicates rows deleted

Email:thota.madhav@gmail.com

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0 No

what eliminate duplicate without using roenum and not..

Answer / satyajit patel

Mr. Kondla is almost right, but forgotten to use keyword
DISTINCT. It should be like

-> create table T2 as select DISTINT(*) from T1;
-> drop table T1;
-> rename T2 to T1;

Is This Answer Correct ?

3 Yes

1 No

what eliminate duplicate without using roenum and not..

Answer / gourav

we can use distinct keyword for elaminate duplicat rows

select distinct(salary)from emplpyees

Is This Answer Correct ?

1 Yes

0 No

what eliminate duplicate without using roenum and not..

Answer / sathish

Use Group clause and having count < 2

Is This Answer Correct ?

1 Yes

3 No

what eliminate duplicate without using roenum and not..

Answer / amar_kondla

>create table table_name2 as select * from table_name1;

>drop table table_name1;

> rename tabale_name2 to table_name1;

Is This Answer Correct ?

1 Yes

4 No

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