Which chart shows the average number of running SQL statements historically?

The chart that shows the average number of running SQL statements historically is the one related to the count of currently running SQL queries. This type of chart provides insights into how many SQL statements are actively being processed at any given time, allowing users to analyze trends over a specific period.

Monitoring running SQL statements is crucial for database performance tuning and diagnosing potential bottlenecks, as it helps identify peaks in database load and assess whether the system can handle concurrent operations effectively.

In contrast, other options focus on different metrics, such as the queuing of statements, the response time of SQL statements, or the number of SQL statements executed per second. While these metrics can provide valuable information about the database performance and efficiency, they do not directly reflect the average number of SQL statements that are actively running. Therefore, they are not relevant to understanding the count of concurrent SQL executions.