Help in SQL Delete

Hi,
I want to delete duplicate rows from the NON KEY table A.
Like Table A has rows
1 A B
2 C D
1 A B
3 K J
3 K J
Here I want to delete 1 and 3 repeated twice. I wants to delete 1 each.
I have huge data. Can any one help me in the sql for this delete.
Thanks,
Madhu

Hi, Madhu,
Here's one way:
DELETE     a
WHERE     ROWID NOT IN (
                          SELECT    MIN (ROWID)
                FROM        a
                GROUP BY column1, column2
;This will leave one row for every distinct combination of (column1, column2); all other rows with the same combination will be DELETEd.
You can GROUP BY as many columns as you need to.
895553 wrote:
... I want to delete duplicate rows from the NON KEY table A.
... I have huge data. Can any one help me in the sql for this delete.It's a good idea to have a primary key for each table, especially if you have "huge data".

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I don't understand why it won't let me delete the strikeout or underline in my Adobe Reader Touch. There is no clear option when I highlight it and write click and the "Ctrl-delete" option is not working either. I need to get rid of both of these. Did them by mistake....simple task but so frustrated that I have spent 30+ minutes trying to figure this out. Please help.
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