SQL question- on how to handle groups of records at a time.

Hi,
I have a sql that looks like the following:
insert into INVALID_DATES_TMP
(id, gid, created, t_rowid, updated)
select id, gid, created, rowid, updated
from TABLE1
where fix_invalid_date_pkg.is_date_invalid('TABLE1', 'CREATED', ROWID) = 'Y';
COMMIT;
What the above sql does is selects all rows from TABLE1 where the CREATED column
has invalid dates and inserts them into invalid_dates_tmp table. So we can process/fix
those invalid dates from the temp table. Problem is our DBA said Table1 can have
millions of rows so the above sql can be very database intensive. So, I need to
figure out another way that may handle chunks of rows at a time from table1.
Any ideas are appreciated!
ThankYou,
Radhika.

Hallo,
in general INSERT AS SELECT is the fastest method to insert into the table.
Probably you can use direct load ? (Hint APPEND).
Other options (INSERT IN LOOP or BULK + FORALL) are slower.
I think, this method is optimal.
Another question is, the function itself. It is not clear, whether it searches the invalid dates optimal. I suppose strong, that function uses dynamic SQL.
Why ? It is better to search static . Or you use this function for many other columns ? Could you post the function also ?
Regards
Dmytro

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Edited by: mburazor on 9-Feb-2012 2:41 PM

Milan,
Yes, the problem is one of analytics not spatial. Here is another go that should be independent of year/month/date/hour/minute
as it does all its math based on an absolute number of minutes since 1970. I round to 5 minutes but you could round/trunc to any
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Note that I have created extra records in the same table that I built. (Tip: good idea to provide a sample dataset to the forum when
asking difficult SQL questions like this.)
drop table buslocns;
create table buslocns(
busno number,
timingpt varchar2(1),
pttime   timestamp,
distance number)
insert into buslocns values (12,'A',to_timestamp('2012/02/10 14:01:00','YYYY/MM/DD HH24:MI:SS'),250);
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insert into buslocns values (12,'A',to_timestamp('2012/02/10 14:01:20','YYYY/MM/DD HH24:MI:SS'),12);
insert into buslocns values (12,'A',to_timestamp('2012/02/10 14:01:30','YYYY/MM/DD HH24:MI:SS'),48);
insert into buslocns values (12,'A',to_timestamp('2012/02/10 14:01:40','YYYY/MM/DD HH24:MI:SS'),100);
insert into buslocns values (12,'A',to_timestamp('2012/02/10 14:01:50','YYYY/MM/DD HH24:MI:SS'),248);
insert into buslocns values (12,'A',to_timestamp('2012/02/10 14:29:40','YYYY/MM/DD HH24:MI:SS'),122);
insert into buslocns values (12,'A',to_timestamp('2012/02/10 14:29:50','YYYY/MM/DD HH24:MI:SS'),72);
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insert into buslocns values (12,'A',to_timestamp('2012/02/10 14:30:10','YYYY/MM/DD HH24:MI:SS'),10);
insert into buslocns values (12,'A',to_timestamp('2012/02/10 14:30:20','YYYY/MM/DD HH24:MI:SS'),12);
insert into buslocns values (12,'A',to_timestamp('2012/02/10 14:59:40','YYYY/MM/DD HH24:MI:SS'),53);
insert into buslocns values (12,'A',to_timestamp('2012/02/10 14:59:50','YYYY/MM/DD HH24:MI:SS'),28);
insert into buslocns values (12,'A',to_timestamp('2012/02/10 15:00:00','YYYY/MM/DD HH24:MI:SS'),12);
insert into buslocns values (12,'A',to_timestamp('2012/02/10 15:00:10','YYYY/MM/DD HH24:MI:SS'),73);
insert into buslocns values (12,'A',to_timestamp('2012/02/10 14:44:40','YYYY/MM/DD HH24:MI:SS'),53);
insert into buslocns values (12,'A',to_timestamp('2012/02/10 14:44:50','YYYY/MM/DD HH24:MI:SS'),28);
insert into buslocns values (12,'A',to_timestamp('2012/02/10 15:45:00','YYYY/MM/DD HH24:MI:SS'),12);
insert into buslocns values (12,'A',to_timestamp('2012/02/10 15:45:10','YYYY/MM/DD HH24:MI:SS'),73);
commit;
with tensOfMinutes as (
select row_number() over (order by busno,timingpt, pttime) as rid,
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       timingpt,
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       round(((cast(pttime as date) - cast('01-JAN-1970' as date)) * 1440) / 5) * 5 as mins,
       distance
from BUSLOCNS
select busno,timingpt,to_char(to_date('01-JAN-1970','DD-MON-YYYY') + ( mins / 1440 ),'DD-MON-YYYY HH24:MI:SS') as pttime,minDist
from (select busno,timingpt,mins,min(distance) as minDist
          from tensOfMinutes a
         group by a.busno, a.timingpt, a.mins
         order by 1, 2, 3 ) ;
-- Result
BUSNO                  TIMINGPT PTTIME               MINDIST
12                     A        10-FEB-2012 14:00:00 12
12                     A        10-FEB-2012 14:30:00 9
12                     A        10-FEB-2012 14:45:00 28
12                     A        10-FEB-2012 15:00:00 12
12                     A        10-FEB-2012 15:45:00 12regards
Simon

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