SQL Query to find highest CPU usage by database

WITH CPU_Per_Db
AS
(SELECT
dmpa.DatabaseID
, DB_Name(dmpa.DatabaseID) AS [Database]
, SUM(dmqs.total_worker_time) AS CPUTimeAsMS
FROM sys.dm_exec_query_stats dmqs
CROSS APPLY
(SELECT
CONVERT(INT, value) AS [DatabaseID]
FROM sys.dm_exec_plan_attributes(dmqs.plan_handle)
WHERE attribute = N'dbid') dmpa
GROUP BY dmpa.DatabaseID)

SELECT
[Database]
,[CPUTimeAsMS]
,CAST([CPUTimeAsMS] * 1.0 / SUM([CPUTimeAsMS]) OVER() * 100.0 AS DECIMAL(5, 2)) AS [CPUTimeAs%]
FROM CPU_Per_Db
ORDER BY [CPUTimeAs%] DESC;