Need a SQL query please

I have a table of servers that includes a field for a datestamp that indicates when the information was updated.  I then have a table full of drive information that also includes historical data from all previous updates.  I need the SUM of LogicalDriveSize and LogicalDriveFreeSpace, but only for the dates that are in the ServerData table.  Does this make since?  Basically it needs to select every record from the ServerDataLogicalDrives table that has a matching ServerName and ExportTime in the ServerData table, then sum the two mentioned fields.
Table: ServerDataLogicalDrives
Fields: ExportTime, LogicalDriveSize, LogicalDriveDriveFreeSpace
 
Table: ServerData
Fields: ServerName, ExportTime

Open in new window

LVL 1
CerixusAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

CerixusAuthor Commented:
Bah, I may have just got it.  Can anyone verify?

SELECT     SUM(ServerDataLogicalDrives.LogicalDriveSize) AS GlobalDriveSize, SUM(ServerDataLogicalDrives.LogicalDriveFreeSpace)
                      AS GlobalDriveFreeSpace
FROM         ServerDataLogicalDrives INNER JOIN
                      ServerData ON ServerDataLogicalDrives.ServerName = ServerData.ServerName AND ServerDataLogicalDrives.ExportTime = ServerData.ExportTime
0
ralmadaCommented:
Looks OK to me. I would just suggest you use Alias to make the query more readable.
 

SELECT  SUM(a.LogicalDriveSize) AS GlobalDriveSize, 
	SUM(a.LogicalDriveFreeSpace) AS GlobalDriveFreeSpace
FROM ServerDataLogicalDrives a
INNER JOIN ServerData b ON a.ServerName = b.ServerName AND a.ExportTime = b.ExportTime

Open in new window

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Query Syntax

From novice to tech pro — start learning today.