External Article

Add and Subtract Dates using DATEADD in SQL Server

Date manipulation is a common scenario when retrieving or storing data in a Microsoft SQL Server database. There are several date functions (DATENAME, DATEPART, DATEADD, DATEDIFF, etc.) that are available and in this tutorial, we look at how to use the DATEADD function in SQL queries, stored procedures, T-SQL scripts, etc. for OLTP databases as well as data warehouse and data science projects.

SQLServerCentral Editorial

Technical Pain Behaviors

In my family’s history of the past 10+ years, we have become well versed in nagging, ongoing, non-debilitating pain. In some ways, the lessons we have learned about physical pain correlate all too well to the types of pain that we technical people are involved with daily. But there is a huge difference, even if […]

SQLServerCentral Article

Boosting Data Accuracy: Resolving Common Data Quality Issues Using SQL

Poor data quality significantly hinders large enterprises from deriving meaningful value. The variety of data is a crucial factor to account for when assessing & rectifying data quality, as diverse data types introduce unique challenges in maintaining accuracy and consistency. Good data quality and integrity are essential for accurate insights, good decision-making, and potential success of large enterprises. Inconsistent, incomplete, and inaccurate data significantly affect business operations, customer satisfaction, and financial performance. SQL provides robust functions to proactively identify and resolve these data quality issues, ensuring accurate, reliable, and consistent data for reporting and analysis.

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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