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How to Select/Update the First Date (or last) in an Inner Join

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Last Modified: 2012-05-09
Hi there let me describe my problem quickly

I have 3 tables. Lets Say Contact, Order, Transaction and there are relations accordingly
Fields Are:
Contact: Contact Id, FirstDate, LastDate
1-N Relation On ContactId
Order: OrderId, ContactId, OrderTotal
1-1 Relation On OrderId
Transaction: OrderId, DateOfIssue

My question is this:
I want to Update All Contacts' FirstDate and LastDate fields accordingly in one query.
I mean If ContactA has 5 Orders (and 5 Transactions) I want to set the date of first transaction as FirstDate and date of last transaction as LastDate in Contact.

Thanks All.
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