Answering Questions On Dropped Columns
Answering a couple of questions from the previous posts about dropping columns.
2026-03-18
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T-SQL
Elements of the SQL Server Update Statement
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Determining Whether Home Addresses Fall Within a Tornado Polygon Using Spatial Functions
Geographic information systems (GIS) play a critical role in emergency response planning and risk assessment. One of the key challenges in this field is determining whether a specific location falls within an area of interest. This capability is especially valuable for property and casualty (P&C) insurers, who need to assess their insured property exposure when severe weather events such as tornadoes occur.
2025-03-04 (first published: 2025-03-03)
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Manage Elastic jobs in Azure using Azure Elastic Jobs Manager
Microsoft Azure offers Azure Elastic Job agent as a managed service, enabling efficient scheduling of T-SQL workloads on Azure SQL Databases. Learn how to configure the service in this article.
2024-06-07 (first published: 2024-05-24)
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2024-03-29
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The difference between BIN2 and Case-Sensitive collations in SQL
Here you will learn about the key differences between the binary and SQL/Windows collations. You will see that even with all sensitivity flags enabled, SQL/Windows collation cannot behave the same way as the binary collations.
2024-03-15
1,935 reads
Writing SQL Server code with AI using GitHub Copilot
Introduction In this article, we will see how to work with GitHub Copilot. GitHub copilot is an interesting plug-in that generates code using AI. The technology is from Microsoft and OpenAI. We will show how to install Copilot, and how to generate SQL Server code (T-SQL) using Copilot. First, we will answer some FAQs about Copilot […]
2024-02-12
13,425 reads
SQL Window Functions Series: LAG() and LEAD()
Dive deep into the powerful SQL window functions, LAG() and LEAD(). Explore their intricacies, discover real-world examples, and avoid common pitfalls.
2023-12-11
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2023-11-27
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Efficient Table Migration to a New Schema in T-SQL
This article will explain why and how you can easily move tables to new schemas if the need arisees.
2024-10-31 (first published: 2023-11-03)
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Fun with JSON II
Comments posted to this topic are about the item Fun with JSON II
Changing Data Types
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Answering Questions On Dropped Columns
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Question of the Day
Fun with JSON II
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