Accurate statistics about the data held in tables are used to provide the best execution strategy for SQL queries. but if the statistics don't accurately reflect the current contents of the table you'll get a poorly-performing query. How do you find out if statistics are correct, and what can you do if the automatic update of statistics isn't right for the way a table is used?
dbWarden is a comprehensive monitoring and alerting solution for SQL Server 2005 or newer. It features an emailed Health Report and includes email and text notifications with customizable metrics for alerts such as Blocking, Long Running Queries and SQL Jobs, CPU %, Log file and TempDB growth.
The environment in which we work can have an affect on the way in which we work. Steve Jones asks today if you have a preference for your environment.
The performance of 'extract, transform, load' (ETL) processes for large quantities of data can always be improved by objective testing and experiment with alternative techniques. The cause of poor performance can sometimes be surprising.
SQL Server Management Studio is where most SQL scripts and queries are run, and although it does a decent job, it doesn't provide much help storing, sharing and managing the scripts particularly in the context of a team. Red Gate is considering building functionality into SSMS to help its users consume and share queries and scripts. Please help us by completing this short survey to help us define the requirements.
SQL Server 2008 has hundreds of new features and improvements for Production DBAs, Developer DBAs, and Business Intelligence specialists…in this book I focus on what I thought were the ten most important new features for Production DBAs.
All software has default values, some of which might not suit your environment. This is especially true with regards to security settings.
There can be more to managing a SQL Server instance than just examining the performance metrics. There are times when understanding how your system is performing for the application is important.
The concept of a sliding window scenario is to manage and keep the same number of partitions on a partitioned table over time. Learn how in this step-by-step from Arshad Ali.
Overview of 2 very important clauses added to SELECT statement in SQL2012 to allow paging on result sets.
By Brian Kelley
Fabiano Amorim has written an excellent article at Simple Talk on securing msdb. Here's...
By Steve Jones
This month we have a new host, which I am grateful for. So many...
I needed to do some research because there is more to #temp tables than...
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I have this data in the OrderHeader table in a SQL Server 2025 database (ordered by CustomerID ASC):
orderid orderdate customerid complete 3 2025-05-10 00:00:00.0002 1 21 2024-01-10 00:00:00.0003 1 15 2023-10-28 00:00:00.0004 1 13 2025-03-08 00:00:00.0006 1 11 2024-04-02 00:00:00.0007 1If I run this query, how many rows are returned?
SELECT * from dbo.OrderHeader where customerid between 3 and '6'See possible answers