Unlock new opportunities for data-driven decision-making by grasping the significance of SQL and structured data in current data and analytics ecosystems like Microsoft Fabric.
2025-03-21
6,522 reads
In this first article, get an introduction to DAX, it's uses, and the basics of a DAX query as compared to a T-SQL query.
2025-01-01 (first published: 2020-03-26)
25,173 reads
Why has Microsoft added new capabilities in SQL Server to connect to other types of data sources? Read on to learn more.
2021-05-14 (first published: 2019-09-09)
10,592 reads
Introduction In response to my approach in the pop...
2020-06-22
9,319 reads
Introduction In response to my approach in the popular MDX Guide for SQL Folks series, I am using SQL as a good frame of reference for starting or developing a new approach for improving your Data Analysis Expression(DAX) language learning experience. This is useful for developers starting to learn the DAX language to more advanced developers who […]
2020-04-30
43,078 reads
A look at SQL-On-Hadoop systems like PolyBase, Hive, Spark SQL in the context Distributed Computing Principles and new Big Data system design approach like the Lambda Architecture.
2019-09-06 (first published: 2017-10-26)
6,021 reads
Running Interactive and Batch SQL Queries on Hadoop and other distributed clusters using SQL.
2019-07-26 (first published: 2017-12-11)
5,406 reads
Running Interactive and Batch SQL Queries on Hadoop and other distributed clusters using SQL.
2019-07-19 (first published: 2017-07-26)
12,673 reads
This article shows an easy way to setup a comprehensive ETL Performance auditing Solution no matter how complicated your ETL setup.
2018-07-17 (first published: 2012-06-05)
18,559 reads
Build and Operationalize scalable Predictive models and intelligent applications using SQL and R.
2017-11-10 (first published: 2016-10-31)
3,410 reads
By HeyMo0sh
Over time, I’ve realised that one of the hardest parts of cloud management isn’t...
By HeyMo0sh
One of the biggest challenges I’ve faced in cloud operations is maintaining clear visibility...
By Steve Jones
I come to Heathrow often. Today is likely somewhere close to 60 trips to...
Comments posted to this topic are about the item Fun with JSON II
Comments posted to this topic are about the item Changing Data Types
Comments posted to this topic are about the item Answering Questions On Dropped Columns
I have some data in a table:
CREATE TABLE #test_data
(
id INT PRIMARY KEY,
name VARCHAR(100),
birth_date DATE
);
-- Step 2: Insert rows
INSERT INTO #test_data
VALUES
(1, 'Olivia', '2025-01-05'),
(2, 'Emma', '2025-03-02'),
(3, 'Liam', '2025-11-15'),
(4, 'Noah', '2025-12-22');
If I run this query, how many rows are returned?
SELECT t1.[key] AS row,
t2.*
FROM OPENJSON(
(
SELECT t.* FROM #test_data AS t FOR JSON PATH
)
) t1
CROSS APPLY OPENJSON(t1.value) t2; See possible answers