Thomas LeBlanc takes a brief look at Query Store:
Here, you will see the four default reports that come with this Option.
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Regressed Queries – shows query history and changes in statistics
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Overall Resource Consumption – history of resources used in the database
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Top resource Consuming Queries – Top x of queries using the most resources
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Tracked Queries – enables you to see multiple query plans for a T-SQL statement and compare the plans or force a plan
For DBAs, this is one of the biggest reasons to upgrade to 2016.