Setting up High Availability in SQL server has some prerequisites. One of these is that the database servers must be members of the same Windows Server Failover Cluster. In this article I show how to succesfully set up WSFC and activate Cluster Aware Updating
2024-06-28
11,000 reads
2024-06-21
500 reads
We experienced several unplanned outages and failovers on our SQL Server Always On Availability Groups. We want to know the root cause to prevent them from happening in the future. How do we identify the root causes of unplanned Availability Group outages and failovers?
2024-05-22
I used the guide in a previous tip on Install SQL Server 2008 on a Windows Server 2008 Cluster Part 1 to install a SQL Server 2008 on a Windows Server 2008 failover cluster (WSFC). Now, I would like to upgrade and migrate my SQL Server 2008 failover clusters to SQL Server 2022 running on Windows Server 2022. What is the process for installation and configuration?
2024-02-26
If you're deploying SQL Server, you are likely running business-critical applications on it and you need to ensure it's protected from downtime and data loss.
2023-01-18
Grant takes a few lessons for database DR from a nuclear accident in the US.
2022-08-06
128 reads
2022-04-15
407 reads
There are a lot of metrics you can track and many ways to use them to improve how you build and manage software. Steve has a few thoughts on MTTR and similar metrics.
2021-07-30
358 reads
What happens with tempdb on a local disk in a cluster? Read on to see that you will not get a failover if the local disk fails
2021-01-04
10,263 reads
In this article, we will review how to configure Always On Availability Groups in Ubuntu Server using the Pacemaker cluster. The following are the high-level steps to configure Always On Availability Groups (AOAG) with an Ubuntu server. Install SQL Server on Ubuntu 16.04 Install Pacemaker agents and configure the cluster Create Always On Availability Groups Create […]
2020-08-25
3,721 reads
By SQLPals
How to Clear the SSMS Cache (SSMS 21 and Later) Updated...
By Arun Sirpal
“What exactly did it do on my server?” is the first question a DBA...
By James Serra
Microsoft shared a broad set of Fabric, Power BI, and SQL updates at FabCon...
Comments posted to this topic are about the item Let's Talk Certifications
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Comments posted to this topic are about the item The Empty Aggregate
I have this table in a SQL Server 2025 database:
CREATE TABLE [dbo].[CustomerOrder] ( [OrderID] [int] NULL, [CustomerID] [int] NULL, [total] [money] NULL ) ON [PRIMARY] GOWhat is returned from this code? (answers are for the sum and then the count)
SELECT SUM(total) AS sum,
COUNT(total) AS count
FROM dbo.CustomerOrder;
See possible answers