Meaning of Group By Checkbox in Query Columns
I am a newbie in PE and found that the "Group By" checkbox is checked sometimes when the operator is Index Seek or Index Scan. Is there any online help talks about the "Query Columns" tab?
Thank you Aaron. I finally understand it, it's nothing to do with the "Sort" operator. The "Group By" column checked because of the "Collapse", "Segment" or "Stream Aggregate" operator 🙂