It is called "update":
UPDATE <table_name> SET <column1> = NULL, <column2> = NULL, <column2> =
NULL;
-----Original Message-----
From: pgsql-admin-owner@postgresql.org
[mailto:pgsql-admin-owner@postgresql.org] On Behalf Of smiley2211
Sent: Thursday, August 09, 2007 10:27 AM
To: pgsql-admin@postgresql.org
Subject: [ADMIN] Delete COLUMN data
Hello all,
I need to DELETE all the DATA from 3 columns in my table...what is the
BEST way to handle this??? I don't want to DROP the columns just clear
out ALL the data in those 3 fields...
Thanks...Michelle
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TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match