Re: PLEASE help ME , HOW TO GENERATE PRIMARY Keys on the fly

Well, you could add a serial column. I'll tell you how, but I haven't tested
the code, so be sure to check it! And using BEGIN and COMMIT/ROLLBACK to
delimit transactions would not be a bad idea at all ;-)

To add a serial column, just write:

--create new serial field
ALTER TABLE md_customer ADD id SERIAL;

If you check your table now, you will see that your new 'id' column contains
correlative values. If this is what you wanted, you could update every tabe
referencing md_customer, like this:

--drop foreign key on remote table
ALTER TABLE xxx DROP CONSTRAINT xxx_fk;

--set old pk values to the value in the 'id' field just created
UPDATE xxx SET fk_field=md_customer.id FROM md_customer CU WHERE
CU.md_customeridpk=xxx.fk_field;

Check if everything is ok now. If it is, then recreate your foreign key,
drop your old pk and rename the new one:

--restore fk on remote table
ALTER TABLE xxx ADD CONSTRAINT xxx_fk FOREIGN KEY (fk_field) REFERENCES
md_customer(id) ON DELETE ... ON UPDATE ...;

--drop old pk
ALTER TABLE md_customer DROP md_customeridpk CASCADE;

--rename id to md_customeridpk
ALTER TABLE md_customer RENAME id TO md_customeridpk;

--create pk
ALTER TABLE md_customer ADD CONSTRAINT md_customer_pk PRIMARY
KEY(md_customeridpk).

That should be it.
Hope it helps.

On 5/24/06, andi <andi(at)mobile-elab(dot)com> wrote:
>
> Dear friends,
>
>
>
> I have table
>
> MD_CUSTOMER
>
> *MD_CUSTOMERIDPK* integer primary key
>
> *NAME *varchar
>
>
>
>
>
> But my primary key is not in correct order like
>
> *MD_CUSTOMER*
>
> MD_CUSTOMERIDPK NAME
>
> 10
> ANDI
>
> 33
> TESTER
>
> 100 KKK
>
>
>
> , so I want to make other primary key to generate sequences 1, 2, 3, … and
> in MS SQL SERVER 2005
>
> I can with Rank() function , but in Postgres how ?
>
>
>
> PLEASE any one can help me, I am really appreciate.
>
>
>
> Best regards
>
>
>
> Andi kusnadi
>