Re: A problem about alter table - Mailing list pgsql-sql

--- jack <datactrl@tpg.com.au> wrote:
> Hi, all
> I'm using postgreSQL 7.2.3. The following statement
> always cuases a parser
> error, "parse error at or near NOT". Please adivse,
> thank you in advance.
> 
> ALTER TABLE _acct_group1
>     ALTER groupkey  SET NOT NULL;
I believe you will need to use:

ALTER TABLE _acct_group1 ADD CONSTRAINT <constraint
name> CHECK groupkey NOT NULL;

I haven't checked that syntax for correctness, but
it's covered in the docs on ALTER TABLE.

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