The exhibit displays Live Query Statistics, identifiable by the "Estimated query progress" bar at the top and the dynamic row count labels (e.g., "392 of 446 (87%)") on the operators, which show real-time data flow versus estimates. A standard Actual Execution Plan is static and typically displays final row counts without progress percentages.

The Key Lookup operator indicates the query utilizes a non-clustered index that does not cover all requested columns, forcing a costly lookup into the clustered index for every row found. This generates significant random I/O and is the primary trigger for the "Missing Index" warning shown (Impact: 99.6%), indicating the query requires tuning via a covering index.

Microsoft Learn. (n.d.). Live Query Statistics. Retrieved from https://learn.microsoft.com/en-us/sql/relational-databases/performance/live-query-statistics

Relevance: Confirms that Live Query Statistics displays the "Estimated query progress" and real-time execution statistics (X of Y rows) as seen in the exhibit.

Microsoft Learn. (n.d.). Key Lookup Showplan Operator. Retrieved from https://learn.microsoft.com/en-us/sql/relational-databases/showplan-logical-and-physical-operators-reference

Relevance: Defines the Key Lookup operator and explains its occurrence when a non-clustered index requires retrieval of data from the clustered index (heap or table), often signaling the need for a covering index to improve performance.