March 2018
Intermediate to advanced
816 pages
19h 35m
English
Content preview from SQL Server 2017 Developer???s Guide
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Capturing the Query info
To simulate a database workload, you will execute one simple query. Ensure that the database is in compatibility mode 110, and that Query Store is empty, in order to track your queries easily:
ALTER DATABASE WideWorldImporters SET COMPATIBILITY_LEVEL = 110;ALTER DATABASE WideWorldImporters SET QUERY_STORE CLEAR;
Run this code to execute one statement 100 times, as shown in the following command:
SET NOCOUNT ON;SELECT * FROM Sales.Orders oINNER JOIN Sales.OrderLines ol ON o.OrderID = ol.OrderIDWHERE SalespersonPersonID IN (0, 897);GO 100
The previous query returns no rows; there are no orders in the Sales.Orders table handled by sales persons with given IDs. After executing this single query 100 times, you can check ...
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