O Robert Urban έγραψε στις Mar 13, 2006 :
> Hello,
>
> let's say I have created a postgresql-7.2.2 db using the following cmds:
>
> CREATE TABLE status
> (
> id SERIAL NOT NULL PRIMARY KEY,
> name VARCHAR(32)
> );
>
> CREATE TABLE event
> (
> id SERIAL NOT NULL PRIMARY KEY,
> description VARCHAR(32),
> status_id INTEGER NOT NULL REFERENCES status(id)
> );
>
> in psql I then see:
>
> mydb=# \d event
> Table "event"
> Column | Type | Modifiers
>
> -------------+-----------------------+--------------------------------------------------
> id | integer | not null default
> nextval('"event_id_seq"'::text)
> description | character varying(32) |
> status_id | integer | not null
> Primary key: event_pkey
> Triggers: RI_ConstraintTrigger_43210
>
>
> The question:
>
> how can I get rid of the "not null" modifier on status_id?
ALTER TABLE event ALTER status_id DROP NOT NULL;
>
> thanks,
>
> Robert Urban
>
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>
--
-Achilleus
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