or
execute your query
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USE AdventureWorks
GO
SELECT CustomerID, Name, SalesPersonID, ModifiedDate
FROM Sales.Store
WHERE (Name='Bike World' AND ModifiedDate > '2004-10-01')
GO
If dbase needs an INDEX, will appear this ‘Missing Index’ green line.
Right click > Missing Index Details 
This will generate T-SQL code for the missing index (SQL Server 2008 Management Studio).
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USE [AdventureWorks]
GO
CREATE NONCLUSTERED INDEX []
ON [Sales].[Store] ([Name],[ModifiedDate])
GO
name the INDEX name
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CREATE NONCLUSTERED INDEX [IDX_Store_Mod_Date]
#create #index #missing
origin - https://www.pipiscrew.com/?p=14499 create-missing-index-on-a-table-on-ssms-2008-and-above