Join SQL Server tables where columns include NULL values
Dealing with NULL values especially when joining tables can become a challenge. Let's take a look at this issue and how this can be resolved.
2021-09-01
Articles
Tracking Failed Job Steps
Recently a customer was asking for a way to alert on job steps that failed, but the job succeeded. They really wanted a custom metric for SQL Monitor, which I submitted, but this post looks at the query in general, trying to determine if a job step failed. Note: Let me start by noting that […]
2021-08-30
6,648 reads
Diagnose and resolve latch contention on SQL Server
This guide describes how to identify and resolve latch contention issues observed when running SQL Server applications on high concurrency systems with certain workloads.
2021-08-30
Schedule Azure SQL DB Processes using Azure Functions
Learn how to schedule processes in Azure SQL Database using an Azure Function in this easy to follow step by step tutorial.
2021-08-30
Formatting T-SQL Scripts using ScriptDOM and PowerShell
Well-formatted scripts are always easier to maintain and enhance readability to high degree. Formatting standards are an important part of coding standards anywhere and if not, they need to be. If there are a large number of scripts this can add up to a significant amount of time needed to maintain them. It is also […]
2021-08-27
8,611 reads
Executing a TSQL batch multiple times using GO
Learn how to execute the same batch of SQL Server commands X number of times using the GO command.
2021-08-27
Flyway with SQLite for Those of a Nervous Disposition
Get started with running Flyway migrations on SQLite databases, using PowerShell.
2021-08-27
Azure Data Factory Incremental Pipeline from Azure SQL Database to Databricks
In this tip find out how to use Azure Data factory to build an incremental pipeline from Azure SQL Database to Databricks.
2021-08-25
Sending streaming data from Azure IoT Central to Azure SQL Database
Introduction In my last article, Working with Azure IoT Central at SQLServerCentral, I gave an overview of Azure IoT Central. I had connected my mobile phone as a device to Azure IoT Central and collected the telemetry data. In this article, I will export the telemetry data continuously from Azure IoT Central to Azure SQL […]
2021-08-23
3,671 reads
Getting Started with Flyway Migrations on PostgreSQL
Phil Factor brings us yet another lesson in Flyway and database migrations. Learn how to use PowerShell with Flyway to run SQL migration scripts that will build, fill and modify a PostgreSQL database.
2021-08-23
Blogs
AI Innovation in Microsoft Keynote
By Chris Yates
I’m thrilled to be covering the Microsoft Keynote: Fuel AI Innovation with Azure Databases on Day...
Benefits of Migrating from Azure Synapse Analytics to Microsoft Fabric
By James Serra
Many customers ask me about the advantages of moving from Azure Synapse Analytics to...
PASS Summit 2024 – A Very Different World
By Brian Kelley
The last data centric conference I attended was the PASS Summit in 2019. A...
Forums
What's New for the Microsoft Data Platform
Comments posted to this topic are about the item What's New for the Microsoft...
Using Outer Joins
Comments posted to this topic are about the item Using Outer Joins
Question of the Day
Using Outer Joins
I have this data in a SQL Server 2019 database:
Customer table CustomerID CustomerName 1 Steve 2 Andy 3 Brian 4 Allen 5 Devin 6 Sally OrderHeader table OrderID CustomerID OrderDate 1 1 2024-02-01 2 1 2024-03-01 3 3 2024-04-01 4 4 2024-05-01 6 4 2024-05-01 7 3 2024-06-07 8 2 2024-04-07I want a list of all customers and their order counts for a period of time, including zero orders. If I run this query, how many rows are returned?
SELECT c.CustomerName, COUNT(oh.OrderID) FROM dbo.Customer AS c LEFT JOIN dbo.OrderHeader AS oh ON oh.CustomerID = c.CustomerID WHERE oh.Orderdate > '2024/04/01' GROUP BY c.CustomerNameSee possible answers