Find missed index in sql server

USE [Crym]
GO
/****** Object:  StoredProcedure [dbo].[sspMissingIndexes]    Script Date: 04/16/2014 20:05:49 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO




ALTER PROCEDURE [dbo].[sspMissingIndexes]

AS

DECLARE @runtime datetime

DECLARE @cpu_time_start bigint, @cpu_time bigint, @elapsed_time_start bigint, @rowcount bigint

DECLARE @queryduration int, @qrydurationwarnthreshold int

DECLARE @querystarttime datetime

SET @runtime = GETDATE()

SET @qrydurationwarnthreshold = 5000

SELECT CONVERT (varchar, @runtime, 126) AS runtime,

  mig.index_group_handle, mid.index_handle,

  CONVERT (decimal (28,1), migs.avg_total_user_cost * migs.avg_user_impact * (migs.user_seeks + migs.user_scans)) AS improvement_measure,

  'CREATE INDEX missing_index_' + CONVERT (varchar, mig.index_group_handle) + '_' + CONVERT (varchar, mid.index_handle)

  + ' ON ' + mid.statement

  + ' (' + ISNULL (mid.equality_columns,'')

  + CASE WHEN mid.equality_columns IS NOT NULL AND mid.inequality_columns IS NOT NULL THEN ',' ELSE '' END + ISNULL (mid.inequality_columns, '')

  + ')'

  + ISNULL (' INCLUDE (' + mid.included_columns + ')', '') AS create_index_statement,

  migs.*, mid.database_id, mid.[object_id]

FROM sys.dm_db_missing_index_groups mig

INNER JOIN sys.dm_db_missing_index_group_stats migs ON migs.group_handle = mig.index_group_handle

INNER JOIN sys.dm_db_missing_index_details mid ON mig.index_handle = mid.index_handle

WHERE CONVERT (decimal (28,1), migs.avg_total_user_cost * migs.avg_user_impact * (migs.user_seeks + migs.user_scans)) > 10

ORDER BY migs.avg_total_user_cost * migs.avg_user_impact * (migs.user_seeks + migs.user_scans) DESC