Better to use a Clustered index or a Non-Clustered index with included columns?

Question

When I look at the execution plan for a particular query I find that 77% of my cost is in a Clustered Index seek.

Does the fact that I\'m using a clustered index m

Answer 1

You have a seek already, so benefits may be minimal.

You can try it though. Options:

• 2nd non-clustered index, keep original
• move clustered index to another column(s)

Are there other good cluster candidates? Note, you always need a unique clustered index (because of uniquifiers + here SO + here). And of course, what is your PK please?