linking two selects

I have two select statements below, that I wish to combine into one

SELECT cgttransactions.linkid, cgttransactions.userid,
cgttransactions.myvarid, cgttransactions.companyid,
Sum(cgttransactions.amount) AS SumOfamount, Avg(cgttransactions.price) AS
AvgOfprice, Sum(cgttransactions.stamp) AS SumOfstamp,
Sum(cgttransactions.comm) AS SumOfcomm, cgttransactions.datetime,
cgttransactions.aimlisted
FROM cgttransactions
GROUP BY cgttransactions.linkid, cgttransactions.userid,
cgttransactions.myvarid, cgttransactions.companyid,
cgttransactions.datetime, cgttransactions.aimlisted
HAVING (((cgttransactions.userid)="1") AND ((cgttransactions.myvarid)=1) AND
((cgttransactions.companyid)="1"));



SELECT cgttransactions.linkid, cgttransactions.sellprice,
cgttransactions.sellcomm, cgttransactions.selldatetime
FROM cgttransactions;

the common field is linkid
How do I do this?
Thanks

re: linking two selects

mantrid wrote:a google search for mysql and join should provide you with some
interesting links on how and what "joins" are.

This is an example (I in no way am related to this link - it was one of
search result links) :
http://www.codinghorror.com/blog/archives/000976.html