Noam Brezis is a technology expert and a senior SQL Server consultant at Madeira SQL Server Services. With over 10 years of experience in various technologies, he enjoys a wide knowledge range, from Visual C#, .Net, C++, MFC, COM and VB, through UNIX and Oracle and up to a deep and thorough understanding of SQL Server. In his work, Noam deals on a daily basis with a broad and varied clientele, designing, developing and troubleshooting their SQL Server systems. Noam also spends part of his career teaching SQL Server and frequently speaks at events such as the Israeli SQL Server User Group.

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Blog Post

Pro and Cons of Parameter Sniffing

Look at the following 3 scripts:
-- 1. Hardcoded
SELECT
*
FROM
Sales.Orders
WHERE
DateAndTime < '19900101'

-- 2. Variable
DECLARE @FilterDate DATETIME = '19900101'
SELECT
*
FROM
Sales.Orders
WHERE
DateAndTime...

2012-01-02

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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