When you work with ETL and the source file is JSON, many documents may get nested attributes in the JSON file. Your requirements will often dictate that you flatten those nested attributes. There are many ways you can flatten the JSON hierarchy, however; I am going to share my experiences with Azure Data Factory (ADF) […]
2021-09-17
19,527 reads
How to use Flyway configuration files to minimize typing during ad-hoc development from PowerShell or DOS; you just type in the Flyway commands you need and hit "go" and the config files take care of all the tiresome connection, authentication and project details.
2021-09-17
In this article we will walk through a clear end-to-end process of securely mounting an ADLS gen2 account in Databricks.
2021-09-17
The ODBC Driver for Salesforce from CData provides ODBC-based access to live Salesforce data, allowing you to interact with Salesforce data in a range of BI, reporting, and ETL tools — as well as directly using SQL queries. In this article, we demonstrate how to connect to Salesforce data using an ODBC connection in Alteryx Designer to conduct self-service BI, data preparation, data blending, and advanced […]
2021-09-15
507 reads
Oracle has built-in functionality to analyze text. Sanil Mhatre demonstrates how to perform a sentiment analysis on data stored in a table using Oracle Text.
2021-09-15
The AWS I3 storage optimized instance family has a potential problem if you choose to use it for storing your data.
2021-09-14
8,702 reads
Over 2500 global database professionals answered questions on their experiences with database monitoring in our annual survey earlier this year. We’re creating four reports from the findings and in our first, The real-world challenges of growing server estates, you’ll discover both insights and trends along with advice for how to tackle the most common challenges.
2021-09-13
The SQL Server identity column is used to populate a column with incrementing numbers on insert. In this article, Greg Larsen explains how it works.
2021-09-13
Introduction Just like every other database, PostgreSQL has its own set of basic datatypes, like Boolean, Varchar, Text, Date, Time, etc. We can easily store data like numbers, characters, date, time, etc. using these supported datatypes, but what if we need to store multiple data elements in a single column? Suppose we are storing the […]
2021-09-10
12,706 reads
Oracle added several enhancements to the sequence object in version 12c, including an “identity” column feature. Jonathan Lewis explains how to work with these new features.
2021-09-10
By Chris Yates
I’m thrilled to be covering the Microsoft Keynote: Fuel AI Innovation with Azure Databases on Day...
By James Serra
Many customers ask me about the advantages of moving from Azure Synapse Analytics to...
By Brian Kelley
The last data centric conference I attended was the PASS Summit in 2019. A...
Comments posted to this topic are about the item What's New for the Microsoft...
Comments posted to this topic are about the item 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