Advanced Update query

I have 2 tables:

Table 1

Table 2

What I am trying to do is update Table1.ItemQuantity with values of Table2.ItemQuantity where their productIDs are equal.

Thanks for your help
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Anthony PerkinsCommented:
Update Table1
Set ItemQuantity = Table2.ItemQuantity
From Table1
         Inner Join Table2 On Table1.ProductID = Table2.ProductID

Also, please maintain this old open question:

What  is the PK for Table1, Table2?

In the scenario illustrated below, should the ItemQuantity be updated with value 5 or 6?

Product1D ItemQuantity
1             4        
2             ?

Product1D ItemQuantity
1             4        
2             5
2             6

SQL you are asking for is listed below. But the update may be incorrect?

Update Table1
Set      ItemQuatity = Table2.ItemQuantity
FROM Table2
WHERE Table1.ProductId = Table2.ProductId


Namasi Navaretnam

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