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SQL Azure let you define maintenance windows.
But you can use a script to perform maintenance tasks such as updating index. This script has a lot of option.
DECLARE @dbname nvarchar(200)
SELECT @dbname = DB_NAME()
EXECUTE dbo.IndexOptimize
@Databases = @dbname,
@FragmentationLow = NULL,
@FragmentationMedium = 'INDEX_REORGANIZE,INDEX_REBUILD_ONLINE',
@FragmentationHigh = 'INDEX_REBUILD_ONLINE',
@FragmentationLevel1 = 5,
@FragmentationLevel2 = 30,
@UpdateStatistics = 'ALL',
@OnlyModifiedStatistics = Y,
@Indexes = 'ALL_INDEXES',
@MinNumberOfPages = 1,
@LogToTable = 'Y'
This blog explains how using it with Azure Automation, to perform it recurrently.
Hope this helps !
