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write sub query for eliminating duplicate rows using
analytical function?
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Answer / korimantu
delete from table name where rowid not in(select max(rowid)
from group by last_name);
or
delete from table name where rowid>(select min(rowid) from
where a.last_name=b.last_name);
| Is This Answer Correct ? | 4 Yes | 2 No |
Answer / vyshak
delete from table where rowid not in (select max(rowid) from
table group by all column names);
or
delete (dense_rank() over(partition by all column names))dn
from table where dn>2;
| Is This Answer Correct ? | 4 Yes | 3 No |
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