2023-07-14
484 reads
T-SQL
Get the Most Current Row From a Detail Table
This article compares the performance of finding the most recent row in a child table for updates, looking at four possible solutions.
2023-07-10
3,735 reads
2023-07-07
548 reads
Starter Metadata T-SQL Query Examples for Databases and Tables
SQL Server provides lots of information about various aspects of server and database objects and this data is referred to as metadata. Understanding what is available and how to use this metadata can greatly enhance and streamline how you can work with SQL Server.
2023-07-07
2023-06-30
462 reads
Paging Data in T-SQL
This article will show you how to page through a set of results using the OFFSET and FETCH options of the ORDER BY clause.
2023-06-28
2023-06-26
490 reads
Same Language, Different Words
I had to come to the Redgate office in Cambridge this past week for a department onsite. As a result, my wife and I were able to come early for a few days adventuring together, the first trip we've taken by ourselves in nearly seven years. As a large family with six kids, it takes […]
2023-06-17
135 reads
Horizontal Trees
Introduction The sp_HorizontalTree procedure introduced here may be used to audit tables with dependent columns. A column is dependent on another if the meaning of the first column depends on the meaning of the second. For example, in a table containing accounting information, the meaning of a Fiscal Quarter column depends on the Fiscal Year to […]
2023-06-16
2,417 reads
2023-06-05
360 reads
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Forums
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Azure Synapse database refresh
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Question of the Day
Fun with JSON I
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 *
FROM OPENJSON(
(
SELECT t.* FROM #test_data AS t FOR JSON PATH
)
) t; See possible answers