Re: Order rows

Yeah...
In fact ROWID is the Oracle implementation and against RDBMS rules. :) ROWID gives information about phisical location of the record. That MUST NOT be in PURE relational database. Nowadays, there is no pure relational database implementation.

BTW, it's better to use sequencial value then the date, coz two rows may be inserted in "about" the same time. "about" may be to small for datetime value to be different (1 second). However in Oracle 9i there is TIMESTAMP datatype where you can specify precision of fractions of seconds. (from 0 to 9 with 6 by default)

Alexandre

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Wednesday, May 15, 2002 9:48 AM

> 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.
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author:
> INET: systems_ho/VGIL_at_vguard.satyam.net.in
>
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> Author: Vikas Khanna
> INET: vkhanna_at_quark.co.in
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Alexandre Gorbatchev
  INET: alexandre.gorbatchev_at_avermann.de

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