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question about inner join syntax

brgdotnet
brgdotnet asked
on
193 Views
Last Modified: 2015-04-09
I have been given this pseudo code in order to write my query. The pseudo code is from someone who is not really strong at SQL, however this persons hase a pretty good idea of what she wants.
So here is the pseudo code.
UPDATE Customer
SET Customer.Id = CopyCust.Id,
    Customer.IsCurrent = CopyCust.IsCurrent
   FROM Customer
   INNER JOIN CopyCust
  ON
Customer.Code = CopyCust.Code
Customer.SSN  = CopyCust.SSN
Customer.LastName = Customer.FirstName

I don't think you can join on several columns at one time. So, What I really think she wanst is the following solution: (What do you think Experts)

UPDATE Customer
SET Customer.Id = CopyCust.Id,
    Customer.IsCurrent = CopyCust.IsCurrent
FROM Customer
INNER JOIN CopyCust
ON
Customer.Code = CopyCust.Code
WHERE
Customer.SSN  = CopyCust.SSN
AND Customer.LastName = Customer.FirstName
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