Dan Guzman


Stairway to Server-side Tracing

Stairway to Server-side Tracing - Level 4: How to Create and View Default and black box Trace Data

An introduction to the SQL Server default and black box traces targeted at DBAs who are new to these specialized traces. The article shows how to enable and disable the default trace feature and create a black box trace. The captured events are discussed along with how to view current and historical trace data of these traces.

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2019-03-26 (first published: )

4,211 reads

Stairway to Server-side Tracing

Stairway to Server-side Tracing - Level 5: How to View and Manage Running Traces

An introduction to the SQL Trace catalog views and functions used to view existing trace definitions targeted at DBAs and Developers. The article discusses T-SQL queries to view defined traces, query trace status and start/stop/delete traces.

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2019-03-26 (first published: )

7,597 reads

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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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