Value window functions are like aggregate window functions that perform multiple operations in a window, but they’re different from aggregate functions. They include things like LAG (), LEAD ...

I realized how much easier my life would be if SQL had a mode() aggregate function. (I'm using it in the mathematical sense). I'm guessing that either I use SQL in a wierd way or there is a good ...

Oracle, SQL Server, Postgres, DB2 - the list goes on.<BR><BR>The reality is you have to restructure your query. A CTE isn't necessary, but will likely make the query more readable.