Vinay Thakur

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Blog Post

Blogging

Hi,
Yesterday while talking to my friend, he reviewed my blog and suggested that I was having so many spelling...

2009-10-13

431 reads

Blog Post

Select count(*)

Today I was reading(I always read Paul Randal).
http://www.sqlskills.com/BLOGS/PAUL/post/Which-index-will-SQL-Server-use-to-count-all-rows.aspx
I learned that whenever you query select count(*) it will select the the...

2009-10-09

1,949 reads

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Fun with JSON II

By Steve Jones - SSC Editor

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Changing Data Types

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Changing Data Types

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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