HELP: Need SQL code for bulk move

Question

I am using Oracle 11.2, there are two tables tb_base, tb_hist as following:
tb_base (id number(5), tag varchar2(16), setTs timestamp(6));
tb_hist(id number(5), histTs timestamp(6), setTs timestamp(6), tag varchar2(16));
tb_base 1, 'adsf', 2012/12/20
1, 'bbb', 2012/12/08
1, 'ccc', 2012/12/30
2, 'aaa', 2012/11/29
2, 'vvv', 2012/11/28
All I need is to move non-latest record with the same id from tb_base to tb_hist as followings:
tb_base 1, 'ccc', 2012/12/30
2, 'aaa', 2012/12/29
tb_hist 1, 'adsf', 2012/12/20, 2012/12/20
1, 'bbb', 2012/12/08, 2012/12/08
2, 'vvv', 2012/11/28, 2012/11/28
Any suggestion on the SQL to complete this task?
Thanks

Answer 1

Copy the historical records to TB_HIST:
INSERT INTO tb_hist
(id
,histts
,setts
,tag)
SELECT id,
       setts,
       setts,
       tag
FROM   tb_base a
WHERE EXISTS (SELECT 1
              FROM  (SELECT id,
                            MAX(setts) OVER (PARTITION BY id) max_setts
                     FROM   tb_base) b
              WHERE  b.id         = a.id
              AND    b.max_setts != a.setts)Delete the historical records from TB_BASE:
DELETE tb_base a
WHERE EXISTS (SELECT 1
              FROM  (SELECT id,
                            MAX(setts) OVER (PARTITION BY id) max_setts
                     FROM   tb_base) b
              WHERE  b.id         = a.id
              AND    b.max_setts != a.setts)