How do you decide the new field value? I guess e.g.

INSERT INTO MyTable (FieldA, FieldB, FieldC)
SELECT FieldA, FieldB, FieldC+4000000
FROM MyTable
WHERE FieldC < 300000

would be quicker than doing each record individually. Though a side
effect could be consuming the CPU 100% for that shorter period of
time, meaning that interactive users could feel the system wasn't
responsive (at least with SuperServer).

Set

--- In firebird-support@yahoogroups.com, "Michael Vilhelmsen" wrote:
> Hi
>
> According to my earlier postings, I would like to know which way is
> best.
>
> I have a table, containing some 4 mill. records.
> Each records has several varchars, date, numeric and integer fields.
> I have to insert around 300.000 more, which will be almost identical
> to some other 300.000 except for 1 field.
>
> What I do now is
>
> Select
> Fields I need
> from table
> where
> some condition
>
>
> Then I iterate through to dataset and insert 1 record for each
> record.
>
> How do I do that the best way ?
>
> Michael