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e.g. I have a table:
create table test (testdata varchar2(255));
then I need an autoincrement field:
alter table test add id numeric(10);
create sequence test_seq
start with 1
increment by 1
nomaxvalue;
create trigger test_trigger
before insert on test
for each row
begin
select test_seq.nextval into :new.id from dual;
end;
what should I do next to populate already existing fields with their serial numbers in “id” ?
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