Identify the missing word(s) in the following sentence within the context of Microsoft Azure. The Query Store provides database administrators with in-depth insights on query plans and performance metrics. SQL Server 2017 introduced a feature called [?]. [?] allows for the gathering and applying machine learning against performance metrics to provide suggested improvements or even allow for self-correction. [?], whether on-premises or in the cloud, allows you to identify issues caused by query execution plan regression.