SQL & BI

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RANKING Function in plain SQL

Below examples will show that we can still write a pure sql query for RANK, DENSE_RANK and ROW_NUMBER without using RANK() function.DECLARE @StudentScore TABLE(StudentName VARCHAR(1),StudentScore INT)INSERT  @StudentScore VALUES ('A',85),...

2012-06-11

53 reads

SQL Azure Federation

 What is Federation?

Federation is a database object like other objects such as tables, views, stored procedures or triggers.
It is also known as Sharding.
There can be multiple federations in a database.
It is...

2012-04-25

388 reads

Blog Post

SQL Azure Federation

 What is Federation?
Federation is a database object like other objects such as tables, views, stored procedures or triggers.It is also known as...

2012-04-25

838 reads

Blog Post

CONCAT in SQL 2012

SQL Server 2012 introduces a brand new string function called CONCAT(). CONCAT() string function allows you to concatenate up to 255 string or variable values in to one single...

2012-04-20

81 reads

Blog Post

CONCAT in SQL 2012

SQL Server 2012 introduces a brand new string function called CONCAT(). CONCAT() string function allows you to concatenate up to...

2012-04-19

464 reads

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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

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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