You have an application named App1 that uses a Microsoft Azure SQL database. Some users report that they receive messages similar to the following error message. "Transaction (Process ID 65) was…

The `sys.dm_os_wait_stats` view provides aggregated information about all waits encountered by threads executing in SQL Server, including wait types related to locking (`LCK_M_X`). Analyzing these wait statistics helps identify patterns of contention that contribute to deadlocks, thus revealing the underlying cause.

The `sys.event_log` in Azure SQL Database logs occurrences of deadlocks but does not provide the detailed transaction and resource information needed to identify the specific cause of a deadlock.

The `sys.resource_stats` view provides historical server-level resource utilization data and is not relevant for diagnosing the cause of a specific deadlock within a database.

The `sys.dm_tran_locks` view displays locks currently held by active transactions; however, a deadlock is a past event by the time the error is reported, so this view would not reconstruct the specific lock contention that led to the deadlock.