How will you delete duplicate records from a table?

Categories >> Software >> MainFrame >> IBM MainFrame >> DB2
Suggest New Category

Question Posted / guest

7 Answers
25034 Views
Google, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

How will you delete duplicate records from a table?..

Answer / tharanath.n

delete from table a
where rowid >(select min(rowid) from table b
where a.column = b.column);

Is This Answer Correct ?

13 Yes

5 No

How will you delete duplicate records from a table?..

Answer / ajay kumar ande

question is wrong......records-----files,table-----rows
How will you delete duplicate records(rows) from a table?

pgm=sort
sortin dd dsn=-----
sortout dd dsn=-----
sysin dd *
sort fields=(2,3,ch,a)
sum fields=none ------>eliminates duplicate recs

Is This Answer Correct ?

3 Yes

1 No

How will you delete duplicate records from a table?..

Answer / venkat

delete from emp where ecode IN ( select ecode from emp group by ecode having count(*) >1 )

Is This Answer Correct ?

5 Yes

4 No

How will you delete duplicate records from a table?..

Answer / mehdee

Hi. This is a database design problem, because if you
alowe duplicate rows then you must have at least a column
being like squence number.

Is This Answer Correct ?

2 Yes

2 No

How will you delete duplicate records from a table?..

Answer / naresh.s

in DB2
first we need to know duplicate records in database file
like tmpfilep ,for that

select RRN(A) from tmpfilep A where field='fieldvalue'

here field means any fileld containd tmpfilep and
corresponding value.

once we execute the above query we will get relative record
numbers of each row and remember that numbers
now you can delete records based on these numbers

delete from tmpfilep A where rrn(A) in (234,341,642)

here 234,341,642 are sample record numbers

may be i am correct upto my knowledge.......

Is This Answer Correct ?

0 Yes

0 No

How will you delete duplicate records from a table?..

Answer / king

DELETE FROM FILE WHERE FIELD = ALL(SELECT FIELD FROM FILE
GROUP BY FIELD HAVING COUNT(*) > 1)

OR

DELETE FROM FILE WHERE FIELD = ANY(SELECT FIELD FROM FILE
GROUP BY FIELD HAVING COUNT(*) > 1)

Is This Answer Correct ?

1 Yes

7 No

How will you delete duplicate records from a table?..

Answer / s

DELETE FROM TABLE ABC
WHERE COLUMN =
(SELECT COLUMN FROM TABLE ABC
GROUP BY COLUMN
HAVING COUNT(*) > 1);

Is This Answer Correct ?

20 Yes

36 No

Post New Answer