SQL - display different data

Hi,

Here is the table for bug:

Attribute | Type | Modifier
---------------+---------+----------------------------------------------
bug_id | integer | not null default nextval('bug_pk_seq'::text)
group_id | integer | not null default '0'
status_id | integer | not null default '0'
priority | integer | not null default '0'
category_id | integer | not null default '0'
submitted_by | integer | not null default '0'
assigned_to | integer | not null default '0'
date | integer | not null default '0'
summary | text |
details | text |
close_date | integer |
bug_group_id | integer | not null default '0'
resolution_id | integer | not null default '0'
Indices: bug_group_id,
bug_groupid_assignedto_statusid,
bug_groupid_statusid,
bug_pkey

When I get to PostgreSQL , when I typed
"Select bug_id, group_id from bug order by id"
I would all id, and group_id from the bug table.

However, when I type
"Select * from bug where bug_id=166"
No rows are returned.

What puzzled me was able to see the bug_id (166) and group_id for bug_id (166) listed when I did
"Select id, group_id from bug order by id".

Any ideas of what's going on?

Thanks in advance.
Mary