This is just a scenario that you may have come across too. For example there is a query (tables and views) that returned data very quickly until yesterday but slowed down today and takes forever. What do you make out of it and why did it run fine until yesterday? What would you first look at to resolve this?
This only a general scenario. I understand there could be a lot of factors like data loads but i want to know the best approach. Thanks in advance for your answer.
svk