altering to varchar(8000) is only a catalog operation (and maybe an index op if the column is indexed) because it stays the same datatype, only the var length changes.
Changing to datatype varchar(max) is actually a change to an other datatype ! (max characteristics)
This also drives the data to an "out of row" condition. It has to find a reference and then go outside the row and page to find the data. All of that takes extra time.
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 not.
Just because you can do something in PowerShell, doesnt mean you should. Helpful Links:
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