Ola Ana Claudia.
You can add a primary key to your table using:
CREATE INDEX ...command
I hope this help you.
José Soares
>Hello,
>
>I'd like to know if is possible create a primary key in a table that already
>exits in database (note: in Oracle is possible), because I try do that and I
>received an ERROR MESSAGES
>
>Example:
>/*Script taht I used to create the table*/
>CREATE TABLE tespri
>(
>pri NUMERIC(3,0) NOT NULL CHECK (pri between 0 and 255),
>sec VARCHAR(4) NOT NULL CHECK (sec<> 'ana')
>);
>
>
>/* End of Script */
>
>
>
>teste=# \d tespri
> Table "tespri"
> Attribute | Type | Modifier
>-----------+----------------------+----------
> pri | numeric(3,0) | not null
> sec | character varying(4) | not null
>Constraints: ((pri >= '0'::"numeric") AND (pri <= '255'::"numeric"))
> (sec <> 'ana'::"varchar")
>
>teste=# alter table tespri add constraint ck1 PRIMARY KEY(pri);
>ERROR: ALTER TABLE / ADD CONSTRAINT is not implemented for that constraint
>type.
>teste=#
>
>/* NOTE: database name teste table name tespri */
>
>Thanks for everything.
>Best Regards,
>Cláudia
>
>
>
>Ana Cláudia Dias
>Aveiro - Portugal
>
>Email: ana-b-dias@ptinovacao.pt
>
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