Tiger,
It is just a recomendation I found in TD docs. It is good that you are getting the same estimates in both cases, But It is recomeneded that when you are using the columns together in equality conditions, then you can collect stats on both of them combined. you can collect stats on individual columns as well.
It is not that much tricky, just take it easy :)
Tiger,
It is just a recomendation I found in TD docs. It is good that you are getting the same estimates in both cases, But It is recomeneded that when you are using the columns together in equality conditions, then you can collect stats on both of them combined. you can collect stats on individual columns as well.
It is not that much tricky, just take it easy :)