External Article

Using a SQL Tokenizer

Imagine this: you have several directories full of SQL script files, and you need to know where a certain table is used. You’d rather like the context too, so you can check the whole SQL Expression and work out why it is running so slowly.

SQLServerCentral Article

Dijkstra's Algorithm

Introduction This article celebrates a classic algorithm [1] of Dijkstra (1930 – 2002) which finds a path of minimal cost between any pair of nodes in an undirected graph. His procedure is widely recognized as a fundamental tool for examining communication and transportation networks (eg. Google Maps) and is surprisingly simple. By his own admission, […]

External Article

Kickstart the year with our free Livestream! Navigating the database landscape in 2024

The key finding from our annual ‘State Of’ survey is that there’s a need for skill diversification to keep up with the pace of technological advances in IT world.

How will this skills gap affect you?

Whether you’re just starting out in your career, you’re a seasoned data professional or you’re a senior IT leader wanting to stay ahead of business growth, join our free livestream on January 23rd.

Redgaters Steve Jones, Ryan Booz and Beca Parker will introduce key findings from the survey and offer their thoughts on the big changes coming in 2024 and what you can do to thrive in this changing landscape.

Register now

Blogs

Cost Visibility: Tracking and Analysing Your Cloud Spend

By

One of the biggest challenges I’ve faced in cloud operations is maintaining clear visibility...

Whiling away an afternoon, thinking

By

I come to Heathrow often. Today is likely somewhere close to 60 trips to...

Black Box vs. Gray Box vs. White Box Testing

By

If your organization is spending money, then meaningful results are a must. Pen testing...

Read the latest Blogs

Forums

Fun with JSON II

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Fun with JSON II

Changing Data Types

By Steve Jones - SSC Editor

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

Answering Questions On Dropped Columns

By Cláudio Silva

Comments posted to this topic are about the item Answering Questions On Dropped Columns

Visit the forum

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