how to find find & delete duplicate rows from two different
tables?
- 3 Answers
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- Accenture, TCS, I also Faced
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Answer / pravin jadhav
delete from table_name where rowid not in (select max(rowid) from table group by
duplicate_values_field_name);
or
delete duplicate_values_field_name dv from table_name ta where rowid <(select min(rowid) from
table_name tb where ta.dv=tb.dv);
| Is This Answer Correct ? | 6 Yes | 0 No |
Answer / paks
using rownum .
Select * from
(Select name,id, Row_number () over (partition by name order by id desc) rn from tblname)
Where rn=1;
| Is This Answer Correct ? | 2 Yes | 3 No |
Answer / k.sailesh
We can find duplicate rows from two tables by using select *
from table name. it displays all the values repeated and unique.
We can delete duplicate rows by using Primary key constraint.
| Is This Answer Correct ? | 3 Yes | 17 No |
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