How to find Missing index on all database on TSQL query

Missing index on all database on single TSQL query

SELECT

mid.database_id dbid,DB_NAME(mid.database_id) [DB_Name], mid.[object_id],mid.statement,

  migs.avg_total_user_cost * (migs.avg_user_impact / 100.0) * (migs.user_seeks + migs.user_scans) AS improvement_measure,

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

  + '_' + LEFT (PARSENAME(mid.statement, 1), 32) + ']'

  + ' 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.*

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 migs.avg_total_user_cost * (migs.avg_user_impact / 100.0) * (migs.user_seeks + migs.user_scans) > 10
and migs.avg_user_impact >=90.00

ORDER BY DB_NAME(mid.database_id),migs.avg_total_user_cost * migs.avg_user_impact * (migs.user_seeks + migs.user_scans) DESC