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hi today we are going to talk about index tuning its a huge topic so uh i should not get overwhelmed when im talking to you about indexes today i will specifically focus on multi-column seeking when you create a non-clustered index as you might know it is a separate storage object and by the virtue of being a b tree structure it has the root page the intermediate levels and the leaf level when you create a non-clustered index you want sql server database engine to traverse through the index and seeking capability is one of the greatest performance benefit of creating uh the non-clustered index now as you know index by itself does not improve performance it just helps you get to the data faster and seeking is one way how you can get faster to the data so you traverse from the root page to the intermediate level and to the leaf level in many cases the optimizer might decide not to see but to scan which means you are scanning the leaf level of the data and when you scan you are touchin