MySQL and Relations

[dbchip2000]

Hi,
I am trying to figure out how I am suppose to relate all the fields here, any help would be great as I have tried all I know how to get it to work
The tables I use are like so

• messages
  • id
  • title
  • description
• ideas
  • id
  • message_id
  • description
• access
  • id
  • message_id
  • user_id
  • group_id
  • definition

FROM messages, ideas, access

 I need a query that allows me to get all the messages where the user_id is 1 or group_id is 2

WHERE access.user_id=1 OR access.group_id=2

 and then have a column showing the message title & description 

SELECT messages.title AS title, messages.description AS description,

 and then have a column that totals how many ideas a message has

COUNT(*)

 with some kind of group by at the end.  But also wanting a sum of the definition from access where the user is 1 or group is 2 since there may be multiple rows of access with different definition security

SUM(access.definition)

 Any help would be great and especially if this could be turned into one single query.  I have had trouble with there being both a count and sum on the two different tables.  Please tell me if there are errors in my coding and thinking.  Thanks