SQLServerCentral Article

Performance Monitoring - Basic Counters

What counters should you monitor to baseline your servers? Which ones for checking performance? It's an interesting question and one that always leads Steve Jones to a wide range of sources in print and on the web. Steve compiled his own list and finally has put some words around the list to give some justification of why they are chosen. Read on and see how this compares to your list (you do have a list don't you?).

SQLServerCentral Article

SQL Server Execution Plans, Second Edition by Grant Fritchey

Every Database Administrator, developer, report writer, and anyone else who writes T-SQL to access SQL Server data, must understand how to read and interpret execution plans. This book leads you right from the basics of capturing plans, through how to interrupt them in their various forms, graphical or XML, and then how to use the information you find there to diagnose the most common causes of poor query performance, and so optimize your SQL queries, and improve your indexing strategy.

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Question of the Day

Getting the Average

I have this data in the dbo.Commission table in a SQL Server 2022 database.

salesperson commission
Brian       12
Brian       16
Andy        7
Andy        14
Andy        21
Steve       20
Steve       NULL
All the data is a varchar, and I decide to run this query to get the totals for each salesperson.
SELECT SalesPerson
     , AVG(TRY_PARSE(Commission AS int)) AS TotalCommission
 FROM commission
 GROUP BY SalesPerson
GO
What average commission is calculated for Steve?

See possible answers