Updated with the sequence column
HelloUsing oracle 10g on Windows XP
I have a table that is having a lot of lines (75,000). I want to update the (recno) column with a sequence number of 1 to the order of 75,000 by MyColumn.
I got below the response of:
CREATE SEQUENCE SAMPLE_SEQ ALL CACHE 20 NOMAXVALUE MINVALUE NOCYCLE 1 INCREMENT OF 1 START WITH 1.
But how do I get the first order column mycolumn. I mean that I want to give the sequence number; but in the order of MyColumn. It is our application need to have a column in a sequence.
Thanks in advance.
Concerning
try something like:
merge into mytable a
using
(select rid, rownum rnum from (
select rowid rid
from mytable
order by mycolumn) b
on (a.rowid = b.rid)
when matched then update
set a.recno = b.rnum
Tags: Database
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