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how will you find out the last three records in a table
with n no of records and delete them

Question Posted / guest

Answers were Sorted based on User's Feedback



how will you find out the last three records in a table with n no of records and delete them..

Answer / aswin

This query cost the performance :
delete from emp where empno in (select empno from (select
empno from emp order by rowid desc) where rownum <= 3)

Is This Answer Correct ?    9 Yes 0 No

how will you find out the last three records in a table with n no of records and delete them..

Answer / ajit

delete from emp
where empno in
(select empno
from emp
minus
select empno
from emp
where rownum <= ( select count(*) - 3
from emp
))

Is This Answer Correct ?    1 Yes 0 No

how will you find out the last three records in a table with n no of records and delete them..

Answer / sudipta santra

delete from
(select * from tab1
minus
select * from tab1 where rownum<n-2 order by rowid)

Is This Answer Correct ?    0 Yes 3 No

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