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find_missing_index_requests.sql
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/**************************************************************************
Find Missing Index Requests
Author: Eric Cobb - http://www.sqlnuggets.com/blog/sql-scripts-how-to-find-missing-indexes/
Source: https://github.com/ericcobb/SQL-Server-Index-Insight-Scripts
Supported Versions: SQL Server 2008, SQL Server 2012, SQL Server 2014, SQL Server 2016, SQL Server 2017
License:
MIT License
Copyright (c) 2017 Eric Cobb
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
***************************************************************************/
USE YourDB --change this
GO
SELECT db.[name] AS [DatabaseName]
,id.[object_id] AS [ObjectID]
,OBJECT_NAME(id.[object_id], db.[database_id]) AS [ObjectName]
,id.[statement] AS [FullyQualifiedObjectName]
,id.[equality_columns] AS [EqualityColumns]
,id.[inequality_columns] AS [InEqualityColumns]
,id.[included_columns] AS [IncludedColumns]
,gs.[unique_compiles] AS [UniqueCompiles]
,gs.[user_seeks] AS [UserSeeks]
,gs.[user_scans] AS [UserScans]
,gs.[last_user_seek] AS [LastUserSeekTime]
,gs.[last_user_scan] AS [LastUserScanTime]
,gs.[avg_total_user_cost] AS [AvgTotalUserCost] -- Average cost of the user queries that could be reduced by the index in the group.
,gs.[avg_user_impact] AS [AvgUserImpact] -- The value means that the query cost would on average drop by this percentage if this missing index group was implemented.
,gs.[system_seeks] AS [SystemSeeks]
,gs.[system_scans] AS [SystemScans]
,gs.[last_system_seek] AS [LastSystemSeekTime]
,gs.[last_system_scan] AS [LastSystemScanTime]
,gs.[avg_total_system_cost] AS [AvgTotalSystemCost]
,gs.[avg_system_impact] AS [AvgSystemImpact] -- Average percentage benefit that system queries could experience if this missing index group was implemented.
,gs.[user_seeks] * gs.[avg_total_user_cost] * (gs.[avg_user_impact] * 0.01) AS [IndexAdvantage]
,'CREATE INDEX [IX_' + OBJECT_NAME(id.[object_id], db.[database_id]) + '_' + REPLACE(REPLACE(REPLACE(ISNULL(id.[equality_columns], ''), ', ', '_'), '[', ''), ']', '') + CASE
WHEN id.[equality_columns] IS NOT NULL
AND id.[inequality_columns] IS NOT NULL
THEN '_'
ELSE ''
END + REPLACE(REPLACE(REPLACE(ISNULL(id.[inequality_columns], ''), ', ', '_'), '[', ''), ']', '') + '_' + LEFT(CAST(NEWID() AS [nvarchar](64)), 5) + ']' + ' ON ' + id.[statement] + ' (' + ISNULL(id.[equality_columns], '') + CASE
WHEN id.[equality_columns] IS NOT NULL
AND id.[inequality_columns] IS NOT NULL
THEN ','
ELSE ''
END + ISNULL(id.[inequality_columns], '') + ')' + ISNULL(' INCLUDE (' + id.[included_columns] + ')', '') AS [ProposedIndex]
,CAST(CURRENT_TIMESTAMP AS [smalldatetime]) AS [CollectionDate]
FROM [sys].[dm_db_missing_index_group_stats] gs WITH (NOLOCK)
INNER JOIN [sys].[dm_db_missing_index_groups] ig WITH (NOLOCK) ON gs.[group_handle] = ig.[index_group_handle]
INNER JOIN [sys].[dm_db_missing_index_details] id WITH (NOLOCK) ON ig.[index_handle] = id.[index_handle]
INNER JOIN [sys].[databases] db WITH (NOLOCK) ON db.[database_id] = id.[database_id]
WHERE db.[database_id] = DB_ID()
--AND OBJECT_NAME(id.[object_id], db.[database_id]) = 'YourTableName'
ORDER BY ObjectName, [IndexAdvantage] DESC
OPTION (RECOMPILE);
GO