2 Possibilities (assuming there is a single record with name == 'Alex' in the drupal_users table; not counting uid 0) 1. There is a record with username = 'Alex' in the phpbb_users table 2. Username is not UNIQUE within phpbb_users Write a select statement to extract username from phpbb_user for BOTH these conditions. Decide how you want to modify those records so that can be imported into drupal_users. David J. -----Original Message----- From: pgsql-general-owner@xxxxxxxxxxxxxx [mailto:pgsql-general-owner@xxxxxxxxxxxxxx] On Behalf Of Alexander Farber Sent: Wednesday, March 09, 2011 9:21 AM To: pgsql-general@xxxxxxxxxxxxxx Subject: Re: Copying data from one table to another - how to specify fields? Oh it is called "INSERT INTO", thank you! I still have a problem though: # select uid, name, mail, created, access from drupal_users; uid | name | mail | created | access -----+------+----------------------------+------------+------------ 0 | | | 0 | 0 1 | Alex | Alexander.Farber@xxxxxxxxx | 1299512207 | 1299751991 (2 rows) # INSERT INTO drupal_users (uid, name, mail, created, access) SELECT user_id, username, user_email, user_regdate, user_lastvisit FROM phpbb_users WHERE user_id > 50 and length(username) > 0; ERROR: duplicate key value violates unique constraint "drupal_users_name_key" I don't understand, what is wrong with "name" here and how to find the troublemaking record in my 4700 lines table -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general