Script to find out CPU Usage on Databases level other then system database

-- If we want to get all the databases CPU usage then uncomment the where condition for DatabaseID
WITH DB_CPU_Stats
AS
(
  SELECT
    DatabaseID,
    DB_Name(DatabaseID) AS [DatabaseName],
    SUM(total_worker_time) AS [CPU_Time_Ms]
  FROM sys.dm_exec_query_stats AS qs
  CROSS APPLY
    (
      SELECT
        CONVERT(int, value) AS [DatabaseID]
      FROM sys.dm_exec_plan_attributes(qs.plan_handle)
      WHERE attribute = N'dbid'
    ) AS F_DB
  GROUP BY DatabaseID
)
SELECT
  ROW_NUMBER() OVER(ORDER BY [CPU_Time_Ms] DESC) AS [row_num],
    DatabaseName,
    [CPU_Time_Ms],
    CAST([CPU_Time_Ms] * 1.0 / SUM([CPU_Time_Ms]) OVER() * 100.0 AS DECIMAL(5, 2)) AS [CPUPercent]
FROM DB_CPU_Stats
WHERE (DatabaseID > 4) 
ORDER BY row_num