Additional Articles


External Article

Webinar | Database Monitoring: The ROI of Build vs. Buy

There are many things to consider when deciding whether to invest in a database monitoring tool or whether to use a homegrown solution. However, the business frequently wants to know one thing and one thing only: what’s the return on this investment (ROI)? In this webinar, Microsoft Data Platform MVP, Grant Fritchey, is joined by our expert panel to share the pros and cons to building a monitoring system versus purchasing one.

2022-12-05

External Article

Oracle optimizer Or Expansion Transformations

The previous installment of this series examined aggregate subquery removal and subquery coalescing, describing the latter as similar in some ways to an inverse for “Or Expansion” and “Join Factorization”. In this instalment, it’s time to take a closer look at Or Expansion and we’ll move on to Join Factorization in the next instalment.

2022-11-30

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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;

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