Services
Technology Web App Development Mobile App Development Windows App Development Database Development UI/UX Development Cloud Development SEO Digital Marketing Guest Posting Content Writing Artificial Intelligence Data Science ERP Development CRM Development CMS Development LMS Development Business Listing Blockchain Technology Startup Promotion
Products
Data Converter Cleaner TUC - Unit Converter Import Export Survey Manager Tweet Controller
Developer
Article Blog Forum Interview Beginner News Startup Quiz
Users
Career
Apply Job Internship
Pricing
Login Sign Up Get a Quote

forum

home / developersection / forums / how to find missing numbers in a sequence in sql server?
Ask Question
Ashutosh Patel
Ashutosh Patel

Web Developer

I am a professional .NET developer with over 4 years of hands-on industry experience in designing, developing, and maintaining scalable web applications. I specialize in .NET Core, C#, RESTful APIs, and database-driven systems using SQL Server.

Message

1 Answers

Khushi Singh
Khushi Singh 06 Jan 2025
Report Abuse

To find missing numbers in a sequence in SQL Server:

Generate a list of all possible numbers using a Common Table Expression (CTE):

WITH AllNumbers AS (
   SELECT TOP (100) ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) AS Number
   FROM master.dbo.spt_values
)

This creates numbers from 1 to 100.

Find missing numbers by comparing with your table:

SELECT Number
FROM AllNumbers
WHERE Number NOT IN (SELECT Number FROM NumbersTable);

This shows numbers missing from your sequence. Adjust TOP (100) to match your range.

MindStick Training