I have the following SELECT that runs in under a second if I remove the ORDER BY at the end. With the ORDER BY it runs in around 9 seconds.
I have a ruff understanding that some other SQL commands like '< >' comparison operators can work adversely with an ORDER BY.
I've tried commenting out lines and can improve the performance to say 2-3seconds with the ORDER BY but still without the ORDER BY its more like under 1 second.
Can someone give me some good advise on how to better write this query, what to avoid etc? All advise is greatly appreciated.