SQL Server update with joins - sql

Question

I am trying to update a date in a table, based off of a MAX(date) in another table. To get the correct data to link up, I have to do 2 inner joins and 2 left outer joins.
I can select the correct data, it returns a Guid (PersonId) and the Date.
I have to use this information to update my original table. I am having trouble getting this to work, I still getting syntax errors.
update tblqualityassignments as assign
inner join tblrequirementteams as team on assign.guidmemberid = team.guidmemberid
set assign.dtmQAPCLed = dtmTaken
from
(
select reg.guidpersonid, max(certs.dtmTaken) as dtmTaken from tblqualityassignments as assign
inner join tblrequirementteams as team on assign.guidmemberid = team.guidmemberid
inner join tblregisteredusercerts as reg on team.guidpersonid = reg.guidpersonid
left outer join tblcerttaken as certs on certs.guidcertid = reg.guidcertid
left outer join tblCodesCertType as types on types.intcerttypeid = certs.intcerttypeid
where types.intcerttypeid = 1
and assign.guidmemberid = team.guidmemberid
group by reg.guidpersonid as data
)
where data.guidpersonid = team.guidpersonid

Answer 1

Assuming you are using SQL Server for this, then this should work:
UPDATE A
SET A.dtmQAPCLed = dtmTaken
FROM tblqualityassignments AS A
INNER JOIN tblrequirementteams as T
ON A.guidmemberid = T.guidmemberid
INNER JOIN (select reg.guidpersonid, max(certs.dtmTaken) as dtmTaken
from tblqualityassignments as assign
inner join tblrequirementteams as team
on assign.guidmemberid = team.guidmemberid
inner join tblregisteredusercerts as reg
on team.guidpersonid = reg.guidpersonid
left outer join tblcerttaken as certs
on certs.guidcertid = reg.guidcertid
left outer join tblCodesCertType as [types]
on [types].intcerttypeid = certs.intcerttypeid
where [types].intcerttypeid = 1
and assign.guidmemberid = team.guidmemberid
group by reg.guidpersonid) data
ON T.guidpersonid = data.guidpersonid