Oracle-L: RE: Order rows

From: Vikas Khanna <vkhanna_at_quark.co.in>
Date: Tue, 14 May 2002 23:48:18 -0800
Message-ID: <F001.00460BD6.20020514234818@fatcity.com>

Ther is no concept first row/ last row in any RDBMS. The concept of ROWID fails as the rows are deleted and hence inserted again. The previous ROWID's are reallocated again. The only way you can get the rows sorted out in the way they have been entered is by creating a column in the table specifying the created_Date as sysdate().

This would continuously prop up the table data wrt this column. And then you could do order by on this column to get the desired result.

Regards,
Vikas Khanna

-----Original Message-----
[mailto:systems_ho/VGIL_at_vguard.satyam.net.in] Sent: Wednesday, May 15, 2002 11:38 AM
To: Multiple recipients of list ORACLE-L

Hi All

Is there any method in Oracle to capture or order the rows in a table in the order they were entered.
I tried it with rowid but when a row is deleted, the rowid corresponding to this row is reassigned for a new row
which is inserted into the table at a later stage.

Eg.

SQL> select rowid,abc.* from abc order by rowid;

ROWID                       A
------------------ ----------
AAAFmYAASAAAYsqAAA        100
AAAFmYAASAAAYsqAAB        200
AAAFmYAASAAAYsqAAC        300

I deleted one transaction.

delete from abc where a=200;
commit;

Then I inserted two rows.

insert into abc values(500);
insert into abc values(600);
commit;

Now when I order by rowid

SQL> select rowid,abc.* from abc order by rowid;

ROWID                       A
------------------ ----------
AAAFmYAASAAAYsqAAA        100
AAAFmYAASAAAYsqAAB        600
AAAFmYAASAAAYsqAAC        300
AAAFmYAASAAAYsqAAD        500

I.e The values I entered last appeared second.The rowid (AAAFmYAASAAAYsqAAB ) corresponding to the row I deleted was reassigned for the last entered row (a=600).
What I want is that this must be sorted in the order of its entry. Can anyone help me out.
Thanks in advance
Systems.

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Author: Vikas Khanna
INET: vkhanna_at_quark.co.in

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