Is SQL DATEDIFF(year, …, …) an Expensive Computation?

Question

I\'m trying to optimize up some horrendously complicated SQL queries because it takes too long to finish.

In my queries, I have dynamically created SQL statements wi

Answer 1

One thing you might be able do to improve performance might be to put an index on the temp table on MID.

Check your execution plan to see if it helps (may depend on the number of rows in the temp table).