Question

I have already created a sequence:

create sequence mainseq as bigint start with 1 increment by 1

How do I use this sequence as the default value of a column?

create table mytable(
    id      bigint not null default mainseq     -- how?
    code    varchar(20) not null
)

Answer 1

It turned out to be easy enough:

create table mytable (
    id      bigint not null constraint DF_mytblid default next value for mainseq,
    code    varchar(20) not null
)

or if the table is already created:

alter table mytable
add constraint DF_mytblid
default next value for mainseq
for id

(thank you Matt Strom for the correction!)