Anyone know the best way to write a median aggregate function in ms sql server 2k? I've seen a couple ways of doing it when I briefly searched google but they weren't presented as functions.

SQL window functions provide extremely powerful and useful features that let you work with observations more easily. Different types explained here.

So I am trying to write an update statement that uses two factors to determine the new value of the field, one of the factors is an aggregate function (COUNT).