Possible Duplicate:
Explicit vs implicit SQL joins
I have two queries in SQL Server.
First query:
Select *
From Stack, Overflow
Where Stack.Id = Overflow.StackId
Second query:
Select *
From Stack
Inner Join Overflow On Overflow.StackId = Stack.Id
These two queries return the same results.
So what is the difference between this two queries in terms of performance?
And which one do you prefer?