Add Get_CPU_Usage_Per_Database script

Author: ktaranov

Scripts/Get_CPU_Usage_Per_Database.sql

@@ -0,0 +1,37 @@
+/*
+<documentation>
+ <summary>Get CPU Usage Per Database</summary>
+ <returns>1 data set with 2 columns: database name and CPUTimeAsPercentage.</returns>
+ <issues>No</issues>
+ <author>Eli Leiba </author>
+ <created>2019-11-05</created>
+ <modified>2019-11-05</modified>
+ <version>1.0</version>
+ <originalLink>https://www.mssqltips.com/sqlservertip/6195/sql-server-function-to-measure-cpu-usage-per-database/</originalLink>
+ <sourceLink>https://github.com/ktaranov/sqlserver-kit/blob/master/Scripts/Get_CPU_Usage_Per_Database.sql</sourceLink>
+</documentation>
+*/
+
+SELECT
+ T.[Database]
+ , T.CPUTimeAsPercentage
+ FROM
+ (SELECT
+ [Database],
+ CONVERT (DECIMAL (6, 3), [CPUTimeInMiliSeconds] * 1.0 /
+ SUM ([CPUTimeInMiliSeconds]) OVER () * 100.0) AS [CPUTimeAsPercentage]
+ FROM 
+ (SELECT
+ dm_execplanattr.DatabaseID,
+ DB_Name(dm_execplanattr.DatabaseID) AS [Database],
+ SUM (dm_execquerystats.total_worker_time) AS CPUTimeInMiliSeconds
+ FROM sys.dm_exec_query_stats dm_execquerystats
+ CROSS APPLY 
+ (SELECT
+ CONVERT (INT, value) AS [DatabaseID]
+ FROM sys.dm_exec_plan_attributes(dm_execquerystats.plan_handle)
+ WHERE attribute = N'dbid'
+ ) dm_execplanattr
+ GROUP BY dm_execplanattr.DatabaseID
+ ) AS CPUPerDb
+ ) AS T;