Stairway to U-SQL Level 2: Breakdown of a U-SQL Statement
Following on from our introduction to U-SQL, we take a look at how a typical U-SQL statement is constructed.
2021-03-03 (first published: 2016-06-22)
8,774 reads
Mike McQuillan
Stairway to U-SQL Level 18: Populating a Data Lake with PowerShell
Learn how PowerShell can be used to manage files and folders in your Data Lake.
2021-01-06 (first published: 2017-10-04)
1,810 reads
Stairway to U-SQL Level 22: Creating a Custom Extractor
Throughout this series, we’ve consistently dealt with delimited text files; comma and tab, for instance. We’ve used the U-SQL built-in extractors to process these files. But what if we need to deal with different types of file, like JSON, XML or fixed width? That’s where custom extractors come in. U-SQL provides us with the ability […]
2020-07-01
1,570 reads
Stairway to U-SQL Level 16: The Azure Data Lake Catalog
Delve behind the scenes and learn about the catalog used to manage Azure Data Lakes.
2020-04-08
2,976 reads
Stairway to U-SQL Level 16: The Azure Data Lake Catalog
Delve behind the scenes and learn about the catalog used to manage Azure Data Lakes.
2020-04-08
92 reads
Stairway to U-SQL Level 9: Views and C# Expressions
Learn how U-SQL views can hide complexity and use C# expressions, providing powerful ways to format and return your data.
2020-03-04 (first published: 2016-10-05)
4,214 reads
Stairway to U-SQL Level 1: Introduction to U-SQL and Azure Data Lakes
An introductory guide to querying files in Azure Data Lakes using Microsoft's U-SQL language.
2020-02-26 (first published: 2016-06-15)
15,252 reads
Stairway to U-SQL Level 3: Processing Multiple Files With U-SQL
In part 3 of the U-SQL Stairway, we look at how multiple files can be processed with a single U-SQL statement.
2019-10-30 (first published: 2016-07-06)
7,045 reads
Stairway to U-SQL Level 21: Exporting Data with Azure Data Factory
Learn how you can move data from your Data Lake to Azure SQL Database with Azure Data Factory.
2019-07-31 (first published: 2018-03-28)
2,340 reads
Stairway to U-SQL Level 20: Querying External Data with U-SQL
Did you know you can query SQL Server data with U-SQL? It's true! Find out how in this latest stairway step.
2018-03-14
1,734 reads
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Level 28: DAX Text Functions: The DAX Extract & Modify Functions: LEFT(), RIGHT(), MID(), REPLACE(), SUBSTITUTE()
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Creating JSON I
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Question of the Day
Creating JSON I
On SQL Server 2025, what happens when I run this code:
SELECT JSON_OBJECTAGG( 'City':'Denver') GOSee possible answers