I am a senior software programmer who is still working hard to get a DBA hat. I am in love with SQL Server. SQL Server for me is all about passion. I am MCSA in SQL Server. Through this blog I am giving myself an opportunity to learn more about SQL, as well as sharing my knowledge and expertise with the world.

Blog Post

Interview Query – 1

Somewhere on internet i found this question. Thought to share it with you all.
We have two tables,  school_students and Class_student.
 
 ...

2018-09-17 (first published: )

2,474 reads

Blog Post

Interview Query – 1

Somewhere on internet i found this question. Thought to share it with you all. We have two tables,  school_students and Class_student.                ...

2018-09-04

23 reads

Blog Post

Starting with MS SQL Server

In one of my previous blog (https://sqldose.wordpress.com/2015/10/20/a-basic-introduction-of-database-tables-and-sql/ ) I gave a basic introduction about what is A Database and what is...

2016-04-10

557 reads

Blog Post

Starting with MS SQL Server

In one of my previous blog (https://sqldose.wordpress.com/2015/10/20/a-basic-introduction-of-database-tables-and-sql/ ) I gave a basic introduction about what is A Database and what is SQL. Now let us start with basic of...

2016-04-10

29 reads

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how to write this query?

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hi everyone I am not sure how to write the query that will produce...

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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