SQL Server tech interview questions must be well crafted to make sure the candidate actually knows the topic. In this article, Sergey Gigoyan provides his favorite questions for interviewing SQL Server developers.
2021-01-27
This article is focused on beginners who have already started writing SQL queries and are now diving deep towards more data processing and complex queries in SQL. When we talk about data processing, an important concept that comes to our mind is performing ETL workloads to a data warehouse. ETL is a very complex topic […]
2021-01-26
4,947 reads
Learn how to create charts and graphs with R and how you can use R code in SSMS to generate and save graphs to an external file.
2021-01-26
One of your SQL Server instance shows a major dip in performance or throughput, affecting all the user databases. You notice that the slow interludes coincide, as if orchestrated. On investigation, it appears that several transactions running over that period were using a lot of space in tempdb. However, which of them, if any, are causing the tempdb bottleneck, and why?
2021-01-26
When it comes to developing a Power BI report, we can use it for accessing data, transforming the data, and turning the data into information using visuals. With no doubt Power BI can do the job from beginning to end. Now, this is not the only, nor necessarily the best, tool for all the steps […]
2021-01-25
17,360 reads
When inserting rows into a heap, SQL Server must sometimes update the PFS page which can PFS contention and affect performance. In this article, Uwe Ricken demonstrates how to measure PFS contention.
2021-01-25
In this tutorial we will cover common questions related to the SQL Server msdb database. This is one of the standard system databases that are part of every SQL Server installation.
2021-01-25
Have you ever wonder how to import flat files to SQL Server on Linux? In this article, I will share my experience loading data to a Linux SQL Server instance using the new Azure Data Studio data import extension from macOS.
2021-01-22 (first published: 2018-11-05)
4,028 reads
If you have SQL Compare, then the SQL Snapper utility is very valuable 'extra' for certain team activities, because it can be freely distributed. It means that any developer can create a SQL Compare snapshot from databases that are on their local workstation and store them on the network.
2021-01-22
In this tip we will cover how to use merge and append in Power BI to add additional data to a dataset that can then be used in reports and visuals
2021-01-22
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
Comments posted to this topic are about the item The Hidden Security Risks of...
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