Can a table have two primary keys
By absolute definition, no. That's why it's called a "Primary" key and there can only be one primary.
In all practicality, yes. You can create a UNIQUE constraint on a NOT NULL column and for all practical intent and purposes it works the same way as a Primary Key. It's what some folks call an "AK" or "Alternate Key".
If this is for an interview, be sure to mention that the PK does NOT have to be the clustered index. You can only have one clustered index.
is pronounced ree-bar and is a Modenism for R
First step towards the paradigm shift of writing Set Based code: Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is usually not.
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