ALTER TABLE - add several columns

Am Donnerstag, 26. August 2004 08:30 schrieb Fuchs Clemens:

Hi,

I just want to add several columns to an existing table. Do I have to call
a statements like below for each new column, or is there a possibility to
do it at once?

- existing table: test
- columns to add: col1 (FK), col2

ALTER TABLE test ADD col1 INT2 NULL;
ALTER TABLE test ADD CONSTRAINT col1_fk FOREIGN KEY (col1) REFERENCES
xy(col1);
ALTER TABLE test ADD col2 INT2 NULL;

I
'd rather like to execute a statement like this:

ALTER TABLE test ADD (
col1 INT2 NULL,
col2 INT2 NULL,
FOREIGN KEY (col1) REFERENCES xy(col1)
);

Take a look at http://www.postgresql.org/docs/7.4/static/sql-altertable.html
You can only add one column per statement, but of course you can place your
statements into a transaction.

kind regards
janning